Re: [Tutor] HELP Please!!!....How Do I Make a Graph Chart Generate in Python Based on my Code

[School]

What is the error you received? What lines does it say are causing the error?

Also, this smells like classwork.

On Sep 20, 2013, at 21:26, znx...@yahoo.com wrote:

> Can anyone please help me figure out what I am NOT doing to make this program 
> work properly.PLEASE !!
> 
> I need to be able to take the user input that is entered in the two graphical 
> boxes of the first window and evaluate it to generate a graph chart which is 
> suppose to display in the second window.  I am totally at a loss for what I 
> am NOT doing, and I know it is something so simple that I am overlooking 
> because I am making this harder that what it most likely really is.
> 
> But I just cannot get it to work properly.  Please HELP !!!  Help me 
> understand what I am doing wrong and how to fix it.  I believe I am on the 
> right path but I'm becoming frustrated and discouraged.  
> 
> I have attached a copy of the code I've compiled so far.
> 
> ___
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> https://mail.python.org/mailman/listinfo/tutor
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP Please!!!....How Do I Make a Graph Chart Generate in Python Based on my Code

[bob gailer]

In addition to Alan's comment:
Saying "it work properly" is totally uninformative. Tell us what is 
happening that you want different.


--
Bob Gailer
919-636-4239
Chapel Hill NC

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP Please!!!....How Do I Make a Graph Chart Generate in Python Based on my Code (znx...@yahoo.com)

[Dino Bektešević]

Hello,

> I have attached a copy of the code I've compiled so far.

Next time just post the code in here, I think that's the general
consensus around here. You should only attach it or use a pastebin if
it's really really long. Considering that usually the only valid
entries here are snippets of code you've isolated that do not work
(functions/methods...), code that gets posted here is usually not too
long.
Anyhow the graphics.py module is unbeknownst to me, but I presume
you're reffering to this one:
http://anh.cs.luc.edu/python/hands-on/3.1/handsonHtml/graphics.html

What you're doing wrong is your input:
principal = eval(input.getText())
apr = eval(input2.getText())
Those commands are in order, however their position in programing is
not. Let's examine:
1. you draw your input screen and define standard inputs for boxes
2. during the drawing session you read in values for which you have
provided input boxes
3. you plot the values in a bar graph.
When this runs it goes like this:
1. you draw your input screen, set values in input boxes to 0.0 and 0.0
2. apr and principal get set to 0.0 and 0.0
3. plot graph and values

and of course every single bar gets ploted to 0, because those are the
values of your inputs. If there is no principal to add apr to there is
no net result. You should make it so that apr and principal get set
AFTER the initial screen drawing session but BEFORE plotting,
therefore after the mouse-click.
You're also making a mistake of not actually changing any values as
the year progresses:
bar = Rectangle(Point(year, 0), Point(year+1, principal))
every bar will have the same height, that of the inputed principal value.

I don't know if it's encouraged here or not, to give straight away
answers, but here it goes anyway because I think znx is missing couple
of other things as well:
To sort out the wrong inputing move the eval() lines after the
win.getMouse() statement, preferably right before the for loop
statement. Your principal grows each year by the value of apr, so if
you have a 1000$ in the bank and the bank awards you with 500$ each
year (good luck with that) then by the end of the first year you
should have 1500$, by the end of the 2nd year 2000$ because the 1st
year becomes the principal for the 2nd year, by 3rd year it's 2500$
and so on
To introduce the changing values you have to have a new variable to
store the increased original value, let's call that variable
"newvalue". Then you have to increase the value of the new variable
every complete step of the for loop. Each full circle of for loop
should see at least 1 newvalue = newvalue +apr (or newvalue+=apr in
short).

This solution removes the need for the # Draw bar for initial
principal set of orders so delete it:
# read values in input boxes AFTER the button click
principal = eval(input.getText())
apr = eval(input2.getText())

#create new value that you'll increase every year by apr
newvalue = principal+apr #this is the net money by the end of 1st year

# Draw a bar for each subsequent year
for year in range(0, 11): #by going from 0 you don't have to
specifically plot 1st year
bar = Rectangle(Point(year, 0), Point(year+1, newvalue))
newvalue = newvalue+apr
bar.setFill("green")
bar.setWidth(2) #I don't know if this serves any purpose
because the width of your bar is defined with year to year+1 values.
Maybe it's the line width?
bar.draw(win)

and that should do it. For a test run use print statement to check
that the for loop does what you want it too and use simple numbers as
principal=1000 and apr=500, you should get 1500, 2000, 2500..
(This looked a lot like a fixed interest rate assignment so I guess
that's the purpose, note that because of the set scale of the graph
you should always use larger numbers because smaller ones will not be
visible).

You can make your y axis change by the value of input if you:
1. read input after button click but before setting the scale
2. set scale from 0 to maximal achievable value + some aditional
"height" that you can see the entire graph (p.s. maximal achievable
value is principal+final_year*apr, so in your case,
principal+11*apr+500 [for spacing])
3. plot the rest

Good luck,
Dino
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP Please!!!....How Do I Make a Graph Chart Generate in Python Based on my Code

[Alan Gauld]

On 21/09/13 04:26, znx...@yahoo.com wrote:

Can anyone please help me figure out what I am NOT doing to make this
program work properly.PLEASE !!


First you need to tell us what "graphics" module you are
using since there is no standard library module by that
name.

Second, you should probably ask for help on their forum
since this list is really for those learning Python and
its standard library.

However, if we know the library we might be able to help
or someone may have some experience.


--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.flickr.com/photos/alangauldphotos

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with postgreSQL and .csv

[Peter Otten]

Ismar Sehic wrote:

> hello.

Ismar, please post in plain text. The markup appears as funny stars over 
here.

> i wrote the following code, to insert some values from a csv file to my
> postgres table :
> 
> ***
> *import psycopg2*
> *conn = psycopg2.connect("host = ***.***.***.*** user=*** dbname =
> ** ")*
> *cur = conn.cursor()*
> *import csv*
> *with open('HotelImages.csv', 'rb') as f:   *
> *mycsv = csv.reader(f, delimiter = '|')*
> *for row in mycsv:*
> *hotel_code = row[0]*
> *hotel_url = row[-1]*
> *sql  = " UPDATE hotel SET path_picture = "+"';"+hotel_url+"'
>  WHERE code LIKE '"+"%"+hotel_code+"'"*
> *print '--->'+sql*
> *cur.execute(sql)*
> *conn.commit()*
> *c.close()*
> *print '->Complete'*
> ****
> 
> 
> the for loop iterates through the table, comparing the values from the csv
> line by line with the table column 'code'.
> example of csv lines:
> ***
> *94176|HAB|7|2|09/094176/094176a_hb_w_007.jpg*
> *94176|HAB|8|3|09/094176/094176a_hb_w_008.jpg*
> *94176|BAR|6|7|09/094176/094176a_hb_ba_006.jpg*
> *94176|RES|5|6|09/094176/094176a_hb_r_005.jpg*
> *94176|HAB|1|1|09/094176/094176a_hb_w_001.jpg*
> *94176|CON|4|8|09/094176/094176a_hb_k_004.jpg*
> *94176|COM|2|4|09/094176/094176a_hb_l_002.jpg*
> *94176|RES|3|5|09/094176/094176a_hb_r_003.jpg*
> ***
> example of the code column value : *GEN94176, XLK94176,KJK94176*
> the number before the first ' | ' gets just one hit in the database table
> column, inserts some random picture once.also, if the same numbers in some
> other 'code' column row are appearing, but in different order, it inserts
> the same picture.
> my goal is to make it write all the picture url values separated by a ';'
> in just one field and to input the data correctly.
> i'm new to python, as a matter of fact, just started to learn programming.
> i would really like to know where is my mistake.advice and help
> appreciated!

In sqlite3

cur.execute("update hotel "
"set path_picture = coalesce(path_picture || ';' || ?, ?) "
"where code like ?;",
(path_picture, path_picture, "%" + code))

would work. Alternatively you could collect pictures with the same code in 
Python:

from collections import defaultdict

code_to_pic = defaultdict(list)
for row in mycsv:
code_to_pic[row[0]].append(row[-1])

cur.executemany("update hotel set path_picture = ? where code like ?",
[(";".join(urls), "%" + code) for code, urls in 
code_to_pic.items()])

Warning: This would overwrite any urls already in the database. It also 
assumes that you have only one match per row of the where-expression. So 
don't do it that way unless you are absolutely sure you understand these 
limitations.

By the way, the right way to do this is to add another table to the db. That 
table should have code and url columns and one row per url/code pair.

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with postgreSQL and .csv

[R. Alan Monroe]

> my goal is to make it write all the picture url values separated by
> a ';' in just one field and to input the data correctly.  

I haven't used postgresql much. Could it be you're just missing
path_picture as part of your data value? i.e.

UPDATE hotel SET path_picture = + hotel_url
UPDATE hotel SET path_picture = path_picture + hotel_url

Alternatively, you could read the entire csv file and generate the
semicolon-separated strings as dictionary entries, then as a second
step, insert all those dictionary entries into the database.

Alan

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help Please

[Dave Angel]

On 07/05/2013 05:10 PM, Ashley Fowler wrote:




This is what I have so far. Can anyone make suggestions or tell me what I need 
to correct?
*
*



First thing to correct is the notion that you're due an instant answer. 
 You get frustrated after 3 minutes, and post a new message in a new 
thread, with slightly different (but still useless) subject line, and 
the new message is slightly different than the first.


People here are volunteers, and you should wait a minimum of 12 hours 
before reposting.  And then it should be a bump, on the same thread, not 
a new message.  And the new message may have corrections to the first, 
but do them as corrections, not a whole new text to read.


So next time:

Post a single message, send it as TEXT, not html, pick a subject line 
that has something to do with the content (90% of the threads here are 
asking for help, so the word help contributes nothing).  Specify your 
python version, specify what happened when you ran it:

1) I expected this...
2) Instead the program did this...

or

I ran it with these arguments, and got this exception, including 
traceback.


Thanks.

--
DaveA

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help (Antonio Zagheni)

[Alan Gauld]

On 24/06/13 14:34, Antonio Zagheni wrote:


But I am trying to paste the clipboard content to MS word and when I do
it MS word becomes not responding.


OK, so the question is not how to manipulate the clipboard but how to 
manipulate MS Word. There are multiple ways to approach that.

What technology are you using to talk to Word?
COM? DLL? Robotic?

Do you have any code you can share to show us what you are trying to do?
Also you could try the Win32 Python mailing list since they are experts 
at integrating Python with Windows things.


--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help (Antonio Zagheni)

[Peter Otten]

Antonio Zagheni wrote:

>> I am a begginer in Pythonu
>> I did a function that returns a string and I want to copy this to the
>> clipboard. I have tried a lot of suggestions found at Google but nothing
>> works properly. Is there an easy way to do that?
>> I am using Python 2.7 and Windows 7.
> 
> It's simple to access the clipboard with Tkinter:

[eryksun]
 
> >>> from Tkinter import Tk, TclError
> >>> root = Tk()
> >>> root.withdraw()
> ''
> >>> root.clipboard_clear()
> 
> >>> root.clipboard_append('eggs ')
> >>> root.clipboard_append('and spam')
> >>> root.clipboard_get()
> 'eggs and spam'
> 
> >>> root.clipboard_clear()
> >>> try: root.clipboard_get()
> ... except TclError as e: print e
> ...
> CLIPBOARD selection doesn't exist or form "STRING" not defined

[Antonio]

> But I am trying to paste the clipboard content to MS word and when I do it
> MS word becomes not responding.
> 
> So, if you can help...

Please show us the python script you are running and tell us how exactly you 
are invoking it.

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help (Antonio Zagheni)

[Antonio Zagheni]

Hello eryksun,

Thanks for your help...

But I am trying to paste the clipboard content to MS word and when I do it MS 
word becomes not responding.

So, if you can help...

Thanks a lot again,

Antonio ZAgheni.


Message: 3
Date: Sun, 23 Jun 2013 18:18:11 -0400
From: eryksun 
To: Antonio Zagheni 
Cc: "tutor@python.org" 
Subject: Re: [Tutor] Help
Message-ID:
    
Content-Type: text/plain; charset=UTF-8

On Thu, Jun 20, 2013 at 6:10 PM, Antonio Zagheni  wrote:
>
> I am a begginer in Python.
> I did a function that returns a string and I want to copy this to the 
> clipboard.
> I have tried a lot of suggestions found at Google but nothing works properly.
> Is there an easy way to do that?
> I am using Python 2.7 and Windows 7.

It's simple to access the clipboard with Tkinter:

    >>> from Tkinter import Tk, TclError
    >>> root = Tk()
    >>> root.withdraw()
    ''
    >>> root.clipboard_clear()

    >>> root.clipboard_append('eggs ')
    >>> root.clipboard_append('and spam')
    >>> root.clipboard_get()
    'eggs and spam'

    >>> root.clipboard_clear()
    >>> try: root.clipboard_get()
    ... except TclError as e: print e
    ...
    CLIPBOARD selection doesn't exist or form "STRING" not defined


--___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help with Python in ArcGIS 10.1!

[bob gailer]

On 6/17/2013 10:26 AM, Jacobs, Teri (CDC/NIOSH/DSHEFS) (CTR) wrote:


Hi,


Hi - welcome to the tutor list. Be aware that we are a few volunteers.

Your question is one very long line. Please in future ensure it is 
wrapped so we don't have to scroll.


I have wrapped it here.


I have a command line

What is a "command line"?

to spread geoprocessing operations across multiple processes
to speed up performance. However, I do not
know how to import the command line (or at least import it properly)
in Python 2.7.2. Here's the script example given on ArcGIS 10.1 Help:
  
import arcpy


# Use half of the cores on the machine.

arcpy.env.parallelProcessingFactor = "50%"

I tried typing it


What is "it". You show 3 lines of code above. Do you mean all 3 lines?


into the command line


What is "the command line"? Do you mean Command Prompt or Python shell?


but nothing happened.


What did you expect?
Did you hit enter after each line?
Did the cursor move to the next line?
Did you get another prompt?
What did the prompt look like?

I think you get the idea - you need to tell us more, since we did not 
watch you try the above.


--
Bob Gailer
919-636-4239
Chapel Hill NC

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[eryksun]

On Thu, Jun 20, 2013 at 6:10 PM, Antonio Zagheni  wrote:
>
> I am a begginer in Python.
> I did a function that returns a string and I want to copy this to the 
> clipboard.
> I have tried a lot of suggestions found at Google but nothing works properly.
> Is there an easy way to do that?
> I am using Python 2.7 and Windows 7.

It's simple to access the clipboard with Tkinter:

>>> from Tkinter import Tk, TclError
>>> root = Tk()
>>> root.withdraw()
''
>>> root.clipboard_clear()

>>> root.clipboard_append('eggs ')
>>> root.clipboard_append('and spam')
>>> root.clipboard_get()
'eggs and spam'

>>> root.clipboard_clear()
>>> try: root.clipboard_get()
... except TclError as e: print e
...
CLIPBOARD selection doesn't exist or form "STRING" not defined
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help regarding game code

[Dave Angel]

On 05/12/2013 03:40 PM, Alex Norton wrote:

im new to python and im in the middle of making a RPS game for a college
unit.


You sent this message 20 minutes after posting a similar one, with a 
DIFFERENT title, on python-list.  You really ought to pick a target and 
pull the trigger once.  Only if no useful responses happen within a day 
or two should you bother the same people a second time on the other forum.


This is not a beginner question, so it belonged on python-list as you 
did first.



--
DaveA
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help regarding game code

[Mark Lawrence]

On 12/05/2013 22:44, Matthew Ngaha wrote:

bWater.clicked.connect( water_clicked ) AttributeError: 'int


use a paste site like http://bpaste.net/+python to show us the code.



No, please put the code inline.  If the original is too long cut it down 
as requested here http://www.sscce.org/


--
If you're using GoogleCrap™ please read this 
http://wiki.python.org/moin/GoogleGroupsPython.


Mark Lawrence

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help regarding game code

[Matthew Ngaha]

>> bWater.clicked.connect( water_clicked ) AttributeError: 'int

use a paste site like http://bpaste.net/+python to show us the code.

i am no expert @ programming myself but that error is telling you you
used an int and tried to access an int method called connect somewhere
in your code. ints do not have this method. However some PyQt objects
(mostly button widgets) do have this method, which is actually a
signal called clicked for when you mouse click on the widget(button).
So basically ints (integers) do not have signals, try and connect the
name(variable name) of what you are clicking to that method, instead
of the int object (bWater)

bWater.clicked.connect( water_clicked )  should become:

button_name.clicked.connect( water_clicked )
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help on python

[Danny Yoo]

For example, see: http://nltk.org.
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help on python

[Alan Gauld]

On 15/04/13 09:54, Jabesa Daba wrote:

is it possible to reorder a sentence in the form of SVO (Subject Verb
Object) into the form of SOV (Subject Object Verb) by using a python
program? if so, how?


Python is a general purpose programming language so yes, you can program 
it to do any computational task. How much work is involved depends on 
how well you can define the algorithm and whether somebody else has 
already implemented it for you in Python.


In your case you need to consider which language you are processing and 
what the grammatical rules are (what is a word? How do you identify a 
subject, object and verb? What are the separator rules and do you need 
to consider changes of endings etc when you change order? etc)

Just how sophisticated does it need to be?)

There are several libraries that can help ranging from general
purpose text processing and parsers to natural language tookits.
Whatever you use you will still need a fair amount of effort
to get it working. Google (or any other search engine!) is your
friend.

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help on python

[Mark Lawrence]

On 15/04/2013 09:54, Jabesa Daba wrote:

is it possible to reorder a sentence in the form of SVO (Subject Verb
Object) into the form of SOV (Subject Object Verb) by using a python
program? if so, how?

regards,



Yes.  By writing code.

You could have answered your own question by typing something like 
"python natural language processing" into your favourite search engine.


--
If you're using GoogleCrap™ please read this 
http://wiki.python.org/moin/GoogleGroupsPython.


Mark Lawrence

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help required

[Mark Lawrence]

First up please give a sensible subject, say "problem parsing csv file".

I'm assuming the crud shown below is due to you posting in html, please 
use plain text instead.


On 20/03/2013 06:12, Arijit Ukil wrote:

I am new to python. My intention is to read the file digi.txt and store
in separate arrays all the values of each columns. However, the
following program prints only the last value, i.e. 1350696500.0.
Please help to rectify this.

f = open (/"digi.txt"/, /"r+"/)


You might like to use the with statement as it saves the explicit close 
later.  Do you really need update mode?  I'll assume not.


with open('digi.txt', 'r') as f:



datafile = f.readlines()


datafile is a poor name, it's the contents of the file here not the file 
itself.




list_of_lists = datafile


This gives another name for datafile which you only use in the for loop, 
you can use datafile directly.



fordata inlist_of_lists:
 lstval = data.split (/','/)


The csv module from the standard library can look after this for you.


 timest = float(lstval[0])
 energy = float(lstval[1])


You do nothing with timest and energy within the for loop.



f.close()
printtimest


You're printing the last value for timest here.

So you need something like the following, I'll leave you to look up the 
csv module if you're interested.


with open('digi.txt', 'r') as f:
lines = f.readlines()
timestamps = []
energies = []
for line in lines:
splits = line.split(',') # I'll admit not the best name
timestamps.append(float(splits[0]))
energies.append(float(splits[1]))

# process timestamps and energies to your heart's content



Regards,
Arijit Ukil


--
If you're using GoogleCrap™ please read this 
http://wiki.python.org/moin/GoogleGroupsPython.


Mark Lawrence

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help required

[Bod Soutar]

On 20 March 2013 06:12, Arijit Ukil  wrote:
> I am new to python. My intention is to read the file digi.txt and store in
> separate arrays all the values of each columns. However, the following
> program prints only the last value, i.e. 1350696500.0.
> Please help to rectify this.
>
> f = open ("digi.txt", "r+")
>
> datafile = f.readlines()
>
> list_of_lists = datafile
> for data in list_of_lists:
> lstval = data.split (',')
> timest = float(lstval[0])
> energy = float(lstval[1])
>
> f.close()
> print timest
>
A few questions to ask yourself.

Is 'f' a descriptive name, equivalent to your other variable names?
What does your third line do, and do you think it's actually required?
What implications would it cause if you removed it?
How do you overcome those issues?
What value is stored in 'timest' the first iteration of the loop, the
second, the third? (Put a print statement in the loop to find out)
Are you actually doing anything with 'energy'?
Do you need to wait until after the loop to close your file?

HTH,
Bodsda
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help required

[Mitya Sirenef]

On 03/20/2013 02:12 AM, Arijit Ukil wrote:
I am new to python. My intention is to read the file digi.txt and 
store in separate arrays all the values of each columns. However, the 
following program prints only the last value, i.e. 1350696500.0.

Please help to rectify this.

f = open (/"digi.txt"/, /"r+"/)

datafile = f.readlines()

list_of_lists = datafile
fordata inlist_of_lists:
lstval = data.split (/','/)
timest = float(lstval[0])
energy = float(lstval[1])

f.close()
printtimest

Regards,
Arijit Ukil



You would want to create an empty list and then
append values to it inside the loop. E.g. lst=[]; lst.append(val)

 -m

--
Lark's Tongue Guide to Python: http://lightbird.net/larks/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help with iterators

[Matthew Johnson]

Dear list,

Sorry for the delay -- it has taken some time for me to get these emails.

It appears i made some dumb error when typing out the description.

Mitya Sirenef was correct to ignore my words and to focus on my code.

Thanks for your help. I may ask again / for more help when i feel i
have tried sufficiently hard to absorb the answers below.

Thanks again

mj

On 22/03/2013, at 6:24 PM, "tutor-requ...@python.org"
 wrote:

> Send Tutor mailing list submissions to
>tutor@python.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
>http://mail.python.org/mailman/listinfo/tutor
> or, via email, send a message with subject or body 'help' to
>tutor-requ...@python.org
>
> You can reach the person managing the list at
>tutor-ow...@python.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Tutor digest..."
>
>
> Today's Topics:
>
>   1. Re: Help with iterators (Mitya Sirenef)
>   2. Re: Help with iterators (Steven D'Aprano)
>   3. Re: Help with iterators (Steven D'Aprano)
>   4. Re: Help with iterators (Mitya Sirenef)
>   5. Please Help (Arijit Ukil)
>
>
> ----------
>
> Message: 1
> Date: Thu, 21 Mar 2013 21:39:12 -0400
> From: Mitya Sirenef 
> To: tutor@python.org
> Subject: Re: [Tutor] Help with iterators
> Message-ID: <514bb640.5050...@lightbird.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 03/21/2013 08:39 PM, Matthew Johnson wrote:
>> Dear list,
>>
>> I have been trying to understand out how to use iterators and in
>> particular groupby statements. I am, however, quite lost.
>>
>> I wish to subset the below list, selecting the observations that have
>> an ID ('realtime_start') value that is greater than some date (i've
>> used the variable name maxDate), and in the case that there is more
>> than one such record, returning only the one that has the largest ID
>> ('realtime_start').
>>
>> The code below does the job, however i have the impression that it
>> might be done in a more python way using iterators and groupby
>> statements.
>>
>> could someone please help me understand how to go from this code to
>> the pythonic idiom?
>>
>> thanks in advance,
>>
>> Matt Johnson
>>
>> _
>>
>> ## Code example
>>
>> import pprint
>>
>> obs = [{'date': '2012-09-01',
>> 'realtime_end': '2013-02-18',
>> 'realtime_start': '2012-10-15',
>> 'value': '231.951'},
>> {'date': '2012-09-01',
>> 'realtime_end': '2013-02-18',
>> 'realtime_start': '2012-11-15',
>> 'value': '231.881'},
>> {'date': '2012-10-01',
>> 'realtime_end': '2013-02-18',
>> 'realtime_start': '2012-11-15',
>> 'value': '231.751'},
>> {'date': '2012-10-01',
>> 'realtime_end': '-12-31',
>> 'realtime_start': '2012-12-19',
>> 'value': '231.623'},
>> {'date': '2013-02-01',
>> 'realtime_end': '-12-31',
>> 'realtime_start': '2013-03-21',
>> 'value': '231.157'},
>> {'date': '2012-11-01',
>> 'realtime_end': '2013-02-18',
>> 'realtime_start': '2012-12-14',
>> 'value': '231.025'},
>> {'date': '2012-11-01',
>> 'realtime_end': '-12-31',
>> 'realtime_start': '2013-01-19',
>> 'value': '231.071'},
>> {'date': '2012-12-01',
>> 'realtime_end': '2013-02-18',
>> 'realtime_start': '2013-01-16',
>> 'value': '230.979'},
>> {'date': '2012-12-01',
>> 'realtime_end': '-12-31',
>> 'realtime_start': '2013-02-19',
>> 'value': '231.137'},
>> {'date': '2012-12-01',
>> 'realtime_end': '-12-31',
>> 'realtime_start': '2013-03-19',
>> 'value': '231.197'},
>> {'date': '2013-01-01',
>> 'r

Re: [Tutor] HELP: Creating animation from multiple plots

[Peter Otten]

Sayan Chatterjee wrote:

> for t in range(0,200):
>   fname = 'file_' + str(t)
> 
> So it will assign fname values file_0, file_1 so on. Dropping the quotes
> is giving me
> 
> IOError: [Errno 2] No such file or directory: 'file_0'
> 
> 
> Indeed the file is not present. In C we write,if we have to record data in
> a file
> 
> FILE *fp
> 
> fp = fopen("file.dat","w")
> 
> 
> Here I want to write different data sets in files having different name
> i.e I want to create the files with the data sets. I am quite new to
> Python, so you can assume zero knowledge while answering. Thanks for your
> support. :)

If you try to open a non-existent file in "r+" mode in C you should get an 
error, too. The following C code

FILE * f;
int i;
char filename[100];

for (i=0; i<10; i++) {
sprintf(filename, "foo%d.dat", i);
FILE * f = fopen(filename, "w");
/* write stuff to file */
...
fclose(f);
}

translates into this piece of Python:

for i in range(10):
filename = "foo%d.dat" % i
with open(filename, "w") as f:
# write stuff to file
...


___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Sayan Chatterjee]

Oh yes, thanks. That worked. :)


On 27 March 2013 21:58, Bod Soutar  wrote:

> You were opening the file for reading, rather than writing. It
> therefore was expecting to find a file.
> Change
> fo = open('fname','r+')
> to
> fo = open('fname','w')
>
> Bodsda
>
> On 27 March 2013 16:17, Sayan Chatterjee 
> wrote:
> > for t in range(0,200):
> >   fname = 'file_' + str(t)
> >
> > So it will assign fname values file_0, file_1 so on. Dropping the quotes
> is
> > giving me
> >
> > IOError: [Errno 2] No such file or directory: 'file_0'
> >
> >
> > Indeed the file is not present. In C we write,if we have to record data
> in a
> > file
> >
> > FILE *fp
> >
> > fp = fopen("file.dat","w")
> >
> >
> > Here I want to write different data sets in files having different name
> i.e
> > I want to create the files with the data sets. I am quite new to Python,
> so
> > you can assume zero knowledge while answering. Thanks for your support.
> :)
> >
> >
> > On 27 March 2013 21:38, Walter Prins  wrote:
> >>
> >> Hello,
> >>
> >> On 27 March 2013 15:59, Sayan Chatterjee 
> >> wrote:
> >>>
> >>> Hi Amit,
> >>>
> >>> fo = fopen('fname','r+')
> >>> fo.write("%d   %d",j,counter)
> >>>
> >>>
> >>> Is giving the following error:
> >>>
> >>> File "ZA.py", line 30, in 
> >>> fo = open('fname','r+')
> >>> IOError: [Errno 2] No such file or directory: 'fname'
> >>>
> >>> Where is the mistake?
> >>
> >>
> >> You are trying to open a file named literally "fname" due to putting it
> in
> >> quotes, you probably want to drop the quotes.
> >>
> >> Walter
> >
> >
> >
> >
> > --
> >
> >
> >
> --
> > Sayan  Chatterjee
> > Dept. of Physics and Meteorology
> > IIT Kharagpur
> > Lal Bahadur Shastry Hall of Residence
> > Room AB 205
> > Mob: +91 9874513565
> > blog: www.blissprofound.blogspot.com
> >
> > Volunteer , Padakshep
> > www.padakshep.org
> >
> > ___
> > Tutor maillist  -  Tutor@python.org
> > To unsubscribe or change subscription options:
> > http://mail.python.org/mailman/listinfo/tutor
> >
>



-- 


--
*Sayan  Chatterjee*
Dept. of Physics and Meteorology
IIT Kharagpur
Lal Bahadur Shastry Hall of Residence
Room AB 205
Mob: +91 9874513565
blog: www.blissprofound.blogspot.com

Volunteer , Padakshep
www.padakshep.org
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Bod Soutar]

You were opening the file for reading, rather than writing. It
therefore was expecting to find a file.
Change
fo = open('fname','r+')
to
fo = open('fname','w')

Bodsda

On 27 March 2013 16:17, Sayan Chatterjee  wrote:
> for t in range(0,200):
>   fname = 'file_' + str(t)
>
> So it will assign fname values file_0, file_1 so on. Dropping the quotes is
> giving me
>
> IOError: [Errno 2] No such file or directory: 'file_0'
>
>
> Indeed the file is not present. In C we write,if we have to record data in a
> file
>
> FILE *fp
>
> fp = fopen("file.dat","w")
>
>
> Here I want to write different data sets in files having different name i.e
> I want to create the files with the data sets. I am quite new to Python, so
> you can assume zero knowledge while answering. Thanks for your support. :)
>
>
> On 27 March 2013 21:38, Walter Prins  wrote:
>>
>> Hello,
>>
>> On 27 March 2013 15:59, Sayan Chatterjee 
>> wrote:
>>>
>>> Hi Amit,
>>>
>>> fo = fopen('fname','r+')
>>> fo.write("%d   %d",j,counter)
>>>
>>>
>>> Is giving the following error:
>>>
>>> File "ZA.py", line 30, in 
>>> fo = open('fname','r+')
>>> IOError: [Errno 2] No such file or directory: 'fname'
>>>
>>> Where is the mistake?
>>
>>
>> You are trying to open a file named literally "fname" due to putting it in
>> quotes, you probably want to drop the quotes.
>>
>> Walter
>
>
>
>
> --
>
>
> --
> Sayan  Chatterjee
> Dept. of Physics and Meteorology
> IIT Kharagpur
> Lal Bahadur Shastry Hall of Residence
> Room AB 205
> Mob: +91 9874513565
> blog: www.blissprofound.blogspot.com
>
> Volunteer , Padakshep
> www.padakshep.org
>
> ___
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Sayan Chatterjee]

Putting "w" instead of "r+" probably solves the problem. The error is not
showing now.


On 27 March 2013 21:47, Sayan Chatterjee  wrote:

> for t in range(0,200):
>   fname = 'file_' + str(t)
>
> So it will assign fname values file_0, file_1 so on. Dropping the quotes
> is giving me
>
> IOError: [Errno 2] No such file or directory: 'file_0'
>
>
> Indeed the file is not present. In C we write,if we have to record data in
> a file
>
> FILE *fp
>
> fp = fopen("file.dat","w")
>
>
> Here I want to write different data sets in files having different name
> i.e I want to create the files with the data sets. I am quite new to
> Python, so you can assume zero knowledge while answering. Thanks for your
> support. :)
>
>
> On 27 March 2013 21:38, Walter Prins  wrote:
>
>> Hello,
>>
>> On 27 March 2013 15:59, Sayan Chatterjee wrote:
>>
>>> Hi Amit,
>>>
>>> fo = fopen('fname','r+')
>>> fo.write("%d   %d",j,counter)
>>>
>>>
>>> Is giving the following error:
>>>
>>> File "ZA.py", line 30, in 
>>> fo = open('fname','r+')
>>> IOError: [Errno 2] No such file or directory: 'fname'
>>>
>>> Where is the mistake?
>>>
>>
>> You are trying to open a file named literally "fname" due to putting it
>> in quotes, you probably want to drop the quotes.
>>
>> Walter
>>
>
>
>
> --
>
>
> --
> *Sayan  Chatterjee*
> Dept. of Physics and Meteorology
> IIT Kharagpur
> Lal Bahadur Shastry Hall of Residence
> Room AB 205
> Mob: +91 9874513565
> blog: www.blissprofound.blogspot.com
>
> Volunteer , Padakshep
> www.padakshep.org
>



-- 


--
*Sayan  Chatterjee*
Dept. of Physics and Meteorology
IIT Kharagpur
Lal Bahadur Shastry Hall of Residence
Room AB 205
Mob: +91 9874513565
blog: www.blissprofound.blogspot.com

Volunteer , Padakshep
www.padakshep.org
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Sayan Chatterjee]

for t in range(0,200):
  fname = 'file_' + str(t)

So it will assign fname values file_0, file_1 so on. Dropping the quotes is
giving me

IOError: [Errno 2] No such file or directory: 'file_0'


Indeed the file is not present. In C we write,if we have to record data in
a file

FILE *fp

fp = fopen("file.dat","w")


Here I want to write different data sets in files having different name i.e
I want to create the files with the data sets. I am quite new to Python, so
you can assume zero knowledge while answering. Thanks for your support. :)


On 27 March 2013 21:38, Walter Prins  wrote:

> Hello,
>
> On 27 March 2013 15:59, Sayan Chatterjee wrote:
>
>> Hi Amit,
>>
>> fo = fopen('fname','r+')
>> fo.write("%d   %d",j,counter)
>>
>>
>> Is giving the following error:
>>
>> File "ZA.py", line 30, in 
>> fo = open('fname','r+')
>> IOError: [Errno 2] No such file or directory: 'fname'
>>
>> Where is the mistake?
>>
>
> You are trying to open a file named literally "fname" due to putting it in
> quotes, you probably want to drop the quotes.
>
> Walter
>



-- 


--
*Sayan  Chatterjee*
Dept. of Physics and Meteorology
IIT Kharagpur
Lal Bahadur Shastry Hall of Residence
Room AB 205
Mob: +91 9874513565
blog: www.blissprofound.blogspot.com

Volunteer , Padakshep
www.padakshep.org
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Walter Prins]

Hello,

On 27 March 2013 15:59, Sayan Chatterjee  wrote:

> Hi Amit,
>
> fo = fopen('fname','r+')
> fo.write("%d   %d",j,counter)
>
>
> Is giving the following error:
>
> File "ZA.py", line 30, in 
> fo = open('fname','r+')
> IOError: [Errno 2] No such file or directory: 'fname'
>
> Where is the mistake?
>

You are trying to open a file named literally "fname" due to putting it in
quotes, you probably want to drop the quotes.

Walter
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Joel Goldstick]

On Wed, Mar 27, 2013 at 11:59 AM, Sayan Chatterjee <
sayanchatter...@gmail.com> wrote:

> Hi Amit,
>
> fo = fopen('fname','r+')
> fo.write("%d   %d",j,counter)
>
>
> Is giving the following error:
>
> File "ZA.py", line 30, in 
> fo = open('fname','r+')
> IOError: [Errno 2] No such file or directory: 'fname'
>
> Where is the mistake?
>

Where is the file called 'fname'?  It must exist and  be in the current
directory

>
> Cheers,
> Sayan
>
>
>
>
>
>
> On 27 March 2013 12:20, Amit Saha  wrote:
>
>> On Wed, Mar 27, 2013 at 4:49 PM, Sayan Chatterjee
>>  wrote:
>> > Yes, ffmpeg will do if multiple plots can be generated using
>> mathplotlib .
>> > I'll look up the links you provided and get back to you, if I can't
>> figure
>> > it out. :)
>>
>> Sure, good luck! :)
>>
>>
>> >
>> >
>> >
>> >
>> > On 27 March 2013 12:12, Amit Saha  wrote:
>> >>
>> >> On Wed, Mar 27, 2013 at 4:36 PM, Sayan Chatterjee
>> >>  wrote:
>> >> > Thanks a lot for your prompt reply.
>> >> >
>> >> > 1. Yes. This is exactly what I wanted. Creating a bunch of data sets
>> and
>> >> > then writing script to plot them using gnuplot, but if something can
>> >> > produce
>> >> > directly 'plots' it will certainly be helpful.
>> >>
>> >> Yes, indeed it is possible. You may want to explore matplotlib a bit.
>> >> You can start with this tutorial [1].
>> >>
>> >> [1] http://www.loria.fr/~rougier/teaching/matplotlib/
>> >>
>> >> >
>> >> > 2. Yes. By stitching them up I meant an animation.Sorry for the
>> >> > ambiguity.
>> >> > Exactly how we can do it Octave.
>> >> >
>> >> > Pls see this link:
>> >> > http://www.krizka.net/2009/11/06/creating-animations-with-octave/
>> >>
>> >> Right, yes, if you see it uses mencoder/ffmpeg to create the
>> >> animation. So, if you save your individual plots and then use one of
>> >> these tools, you should be able to get the animation done.
>> >>
>> >> Matplotlib itself seems to have some Animated plotting capabilities,
>> >> but I haven't had any experience with them.
>> >>
>> >>
>> >> Best,
>> >> Amit.
>> >>
>> >>
>> >> --
>> >> http://amitsaha.github.com/
>> >
>> >
>> >
>> >
>> > --
>> >
>> >
>> >
>> --
>> > Sayan  Chatterjee
>> > Dept. of Physics and Meteorology
>> > IIT Kharagpur
>> > Lal Bahadur Shastry Hall of Residence
>> > Room AB 205
>> > Mob: +91 9874513565
>> > blog: www.blissprofound.blogspot.com
>> >
>> > Volunteer , Padakshep
>> > www.padakshep.org
>>
>>
>>
>> --
>> http://amitsaha.github.com/
>>
>
>
>
> --
>
>
> --
> *Sayan  Chatterjee*
> Dept. of Physics and Meteorology
> IIT Kharagpur
> Lal Bahadur Shastry Hall of Residence
> Room AB 205
> Mob: +91 9874513565
> blog: www.blissprofound.blogspot.com
>
> Volunteer , Padakshep
> www.padakshep.org
>
> ___
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>
>


-- 
Joel Goldstick
http://joelgoldstick.com
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Sayan Chatterjee]

Hi Amit,

fo = fopen('fname','r+')
fo.write("%d   %d",j,counter)


Is giving the following error:

File "ZA.py", line 30, in 
fo = open('fname','r+')
IOError: [Errno 2] No such file or directory: 'fname'

Where is the mistake?

Cheers,
Sayan






On 27 March 2013 12:20, Amit Saha  wrote:

> On Wed, Mar 27, 2013 at 4:49 PM, Sayan Chatterjee
>  wrote:
> > Yes, ffmpeg will do if multiple plots can be generated using mathplotlib
> .
> > I'll look up the links you provided and get back to you, if I can't
> figure
> > it out. :)
>
> Sure, good luck! :)
>
> >
> >
> >
> >
> > On 27 March 2013 12:12, Amit Saha  wrote:
> >>
> >> On Wed, Mar 27, 2013 at 4:36 PM, Sayan Chatterjee
> >>  wrote:
> >> > Thanks a lot for your prompt reply.
> >> >
> >> > 1. Yes. This is exactly what I wanted. Creating a bunch of data sets
> and
> >> > then writing script to plot them using gnuplot, but if something can
> >> > produce
> >> > directly 'plots' it will certainly be helpful.
> >>
> >> Yes, indeed it is possible. You may want to explore matplotlib a bit.
> >> You can start with this tutorial [1].
> >>
> >> [1] http://www.loria.fr/~rougier/teaching/matplotlib/
> >>
> >> >
> >> > 2. Yes. By stitching them up I meant an animation.Sorry for the
> >> > ambiguity.
> >> > Exactly how we can do it Octave.
> >> >
> >> > Pls see this link:
> >> > http://www.krizka.net/2009/11/06/creating-animations-with-octave/
> >>
> >> Right, yes, if you see it uses mencoder/ffmpeg to create the
> >> animation. So, if you save your individual plots and then use one of
> >> these tools, you should be able to get the animation done.
> >>
> >> Matplotlib itself seems to have some Animated plotting capabilities,
> >> but I haven't had any experience with them.
> >>
> >>
> >> Best,
> >> Amit.
> >>
> >>
> >> --
> >> http://amitsaha.github.com/
> >
> >
> >
> >
> > --
> >
> >
> >
> --
> > Sayan  Chatterjee
> > Dept. of Physics and Meteorology
> > IIT Kharagpur
> > Lal Bahadur Shastry Hall of Residence
> > Room AB 205
> > Mob: +91 9874513565
> > blog: www.blissprofound.blogspot.com
> >
> > Volunteer , Padakshep
> > www.padakshep.org
>
>
>
> --
> http://amitsaha.github.com/
>



-- 


--
*Sayan  Chatterjee*
Dept. of Physics and Meteorology
IIT Kharagpur
Lal Bahadur Shastry Hall of Residence
Room AB 205
Mob: +91 9874513565
blog: www.blissprofound.blogspot.com

Volunteer , Padakshep
www.padakshep.org
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Sayan Chatterjee]

Yes, ffmpeg will do if multiple plots can be generated using mathplotlib .
I'll look up the links you provided and get back to you, if I can't figure
it out. :)




On 27 March 2013 12:12, Amit Saha  wrote:

> On Wed, Mar 27, 2013 at 4:36 PM, Sayan Chatterjee
>  wrote:
> > Thanks a lot for your prompt reply.
> >
> > 1. Yes. This is exactly what I wanted. Creating a bunch of data sets and
> > then writing script to plot them using gnuplot, but if something can
> produce
> > directly 'plots' it will certainly be helpful.
>
> Yes, indeed it is possible. You may want to explore matplotlib a bit.
> You can start with this tutorial [1].
>
> [1] http://www.loria.fr/~rougier/teaching/matplotlib/
>
> >
> > 2. Yes. By stitching them up I meant an animation.Sorry for the
> ambiguity.
> > Exactly how we can do it Octave.
> >
> > Pls see this link:
> > http://www.krizka.net/2009/11/06/creating-animations-with-octave/
>
> Right, yes, if you see it uses mencoder/ffmpeg to create the
> animation. So, if you save your individual plots and then use one of
> these tools, you should be able to get the animation done.
>
> Matplotlib itself seems to have some Animated plotting capabilities,
> but I haven't had any experience with them.
>
>
> Best,
> Amit.
>
>
> --
> http://amitsaha.github.com/
>



-- 


--
*Sayan  Chatterjee*
Dept. of Physics and Meteorology
IIT Kharagpur
Lal Bahadur Shastry Hall of Residence
Room AB 205
Mob: +91 9874513565
blog: www.blissprofound.blogspot.com

Volunteer , Padakshep
www.padakshep.org
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Amit Saha]

On Wed, Mar 27, 2013 at 4:36 PM, Sayan Chatterjee
 wrote:
> Thanks a lot for your prompt reply.
>
> 1. Yes. This is exactly what I wanted. Creating a bunch of data sets and
> then writing script to plot them using gnuplot, but if something can produce
> directly 'plots' it will certainly be helpful.

Yes, indeed it is possible. You may want to explore matplotlib a bit.
You can start with this tutorial [1].

[1] http://www.loria.fr/~rougier/teaching/matplotlib/

>
> 2. Yes. By stitching them up I meant an animation.Sorry for the ambiguity.
> Exactly how we can do it Octave.
>
> Pls see this link:
> http://www.krizka.net/2009/11/06/creating-animations-with-octave/

Right, yes, if you see it uses mencoder/ffmpeg to create the
animation. So, if you save your individual plots and then use one of
these tools, you should be able to get the animation done.

Matplotlib itself seems to have some Animated plotting capabilities,
but I haven't had any experience with them.


Best,
Amit.


-- 
http://amitsaha.github.com/
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Sayan Chatterjee]

Thanks a lot for your prompt reply.

1. Yes. This is exactly what I wanted. Creating a bunch of data sets and
then writing script to plot them using gnuplot, but if something can
produce directly 'plots' it will certainly be helpful.

2. Yes. By stitching them up I meant an animation.Sorry for the
ambiguity. Exactly how we can do it Octave.

Pls see this link:
http://www.krizka.net/2009/11/06/creating-animations-with-octave/

I think Python is THE language, which may come to an immediate rescue.

My OS is Linux Mint (Gnome 3)

Sayan


On 27 March 2013 11:57, Amit Saha  wrote:

> On Wed, Mar 27, 2013 at 4:23 PM, Amit Saha  wrote:
> > Hi Sayan,
> >
> > On Wed, Mar 27, 2013 at 4:14 PM, Sayan Chatterjee
> >  wrote:
> >> Dear All,
> >>
> >> I am a newbie to Python but have a fair know how of other languages i.e
> C
> >> etc.
> >>
> >> I want to run an astrophysical simulation in Python. All I have to do
> it to
> >> generate a set of 'plots' depending on a varying parameter and then
> stitch
> >> them up.
> >>
> >> 1) Is it possible to automatically generate different data files( say
> in the
> >> orders of 1000) with different names depending on a parameter?
> >
> > It certainly is. Are you talking about the file names being
> > file_1001.txt, file_1002.txt and so on? If yes, let's say  your
> > parameter values are stored in param. Then something like this would
> > do the trick:
> >
> > param_values = [1000,1001, 1005, 2001]
> >
> > for param in param_values:
> > fname = 'file_' + str(param)
> >
> >
> ># write to file fname
> >#
> >#
> >
> >
> > Sorry if its different from what you are looking for. But yes, its
> > certainly possible.
> >
> >
> >>
> >> 2) Is it possible to plot the data sets right from Python itself and
> save
> >> the plots in different jpeg files to stitched upon later on.
> >
> > It is possible to generate plots and save each as JPEGs. [1].
> >
> > What do you mean by stitching together?
>
> You probably meant creating an animation from them. Yes,  it is
> certainly possible. I will try to find a link which makes it really
> easy to create an animation out of a bunch of images. Which operating
> system are you on?
>
> -Amit.
>
>
>
> --
> http://amitsaha.github.com/
>



-- 


--
*Sayan  Chatterjee*
Dept. of Physics and Meteorology
IIT Kharagpur
Lal Bahadur Shastry Hall of Residence
Room AB 205
Mob: +91 9874513565
blog: www.blissprofound.blogspot.com

Volunteer , Padakshep
www.padakshep.org
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Amit Saha]

On Wed, Mar 27, 2013 at 4:23 PM, Amit Saha  wrote:
> Hi Sayan,
>
> On Wed, Mar 27, 2013 at 4:14 PM, Sayan Chatterjee
>  wrote:
>> Dear All,
>>
>> I am a newbie to Python but have a fair know how of other languages i.e C
>> etc.
>>
>> I want to run an astrophysical simulation in Python. All I have to do it to
>> generate a set of 'plots' depending on a varying parameter and then stitch
>> them up.
>>
>> 1) Is it possible to automatically generate different data files( say in the
>> orders of 1000) with different names depending on a parameter?
>
> It certainly is. Are you talking about the file names being
> file_1001.txt, file_1002.txt and so on? If yes, let's say  your
> parameter values are stored in param. Then something like this would
> do the trick:
>
> param_values = [1000,1001, 1005, 2001]
>
> for param in param_values:
> fname = 'file_' + str(param)
>
>
># write to file fname
>#
>#
>
>
> Sorry if its different from what you are looking for. But yes, its
> certainly possible.
>
>
>>
>> 2) Is it possible to plot the data sets right from Python itself and save
>> the plots in different jpeg files to stitched upon later on.
>
> It is possible to generate plots and save each as JPEGs. [1].
>
> What do you mean by stitching together?

You probably meant creating an animation from them. Yes,  it is
certainly possible. I will try to find a link which makes it really
easy to create an animation out of a bunch of images. Which operating
system are you on?

-Amit.



-- 
http://amitsaha.github.com/
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP: Creating animation from multiple plots

[Amit Saha]

Hi Sayan,

On Wed, Mar 27, 2013 at 4:14 PM, Sayan Chatterjee
 wrote:
> Dear All,
>
> I am a newbie to Python but have a fair know how of other languages i.e C
> etc.
>
> I want to run an astrophysical simulation in Python. All I have to do it to
> generate a set of 'plots' depending on a varying parameter and then stitch
> them up.
>
> 1) Is it possible to automatically generate different data files( say in the
> orders of 1000) with different names depending on a parameter?

It certainly is. Are you talking about the file names being
file_1001.txt, file_1002.txt and so on? If yes, let's say  your
parameter values are stored in param. Then something like this would
do the trick:

param_values = [1000,1001, 1005, 2001]

for param in param_values:
fname = 'file_' + str(param)


   # write to file fname
   #
   #


Sorry if its different from what you are looking for. But yes, its
certainly possible.


>
> 2) Is it possible to plot the data sets right from Python itself and save
> the plots in different jpeg files to stitched upon later on.

It is possible to generate plots and save each as JPEGs. [1].

What do you mean by stitching together?

[1] http://stackoverflow.com/questions/8827016/matplotlib-savefig-in-jpeg-format


Best,
Amit
-- 
http://amitsaha.github.com/
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with installing and/or running PyNomo

[Alan Gauld]

On 23/03/13 22:35, Edythe Thompson wrote:

Using Python 2.6.5
Mac OS X version 10.6.8

I want to run the PyNomo package that uses python.


This list is for learning core Python so you are probably better off 
asking on a PyNomo forum or mailing list. Or at the very least the 
MacPython list.


However,


Python 2.7.1 (r271:86882M, Nov 30 2010, 10:35:34)


This is running Python 2.7 not the 2.6 that you installed.

This os probably because your MacOS has python 2.7 installed by default.
You will maybe need to explicitly run  the 2.6 version for PyNomo.


Traceback (most recent call last):
   File "/Users/edythethompson/Desktop/Type8-Sample.py", line 3, in 
 from pynomo.nomographer import *
ImportError: No module named pynomo.nomographer
 >>>


I have no idea what PyNomo is or how it works so thats a guess but there 
is also a danger that some of your other packages have installed 
themselves in the wrong Python so some may be inPython 2.6 and others in 
2.7! That's a pure guess...


But what the error says is that python 2.7 doesn't know what/where 
PyNomo is.


My best advice is to see if there is a Python 2./7 version available and 
if so install that instead. Failing that check that all your installs 
have been in the 2.6 area and then run Python2.6 (create a shortcut to 
the executable)


Finally your paste suggests you are actually running Python within IDLE. 
That may not be the best thing to do when using 3rd party packages like 
PyNomo.


Again check with a PyNomo forum (or the developer if there is
no forum)


HTH
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help with iterators

[Mitya Sirenef]

On 03/21/2013 10:20 PM, Steven D'Aprano wrote:

On 22/03/13 12:39, Mitya  Sirenef wrote:

>
>> You can do it with groupby like so:
>>
>>
>> from itertools import groupby
>> from operator import itemgetter
>>
>> maxDate = "2013-03-21"
>> mmax = list()
>>
>> obs.sort(key=itemgetter('date'))
>>
>> for k, group in groupby(obs, key=itemgetter('date')):
>> group = [dob for dob in group if dob['realtime_start'] <= maxDate]
>> if group:
>> group.sort(key=itemgetter('realtime_start'))
>> mmax.append(group[-1])
>>
>> pprint.pprint(mmax)
>
>
> This suffers from the same problem of finding six records instead of one,
> and that four of the six have start dates before the given date instead
> of after it.


OP said his code produces the needed result and I think his description
probably doesn't match what he really intends to do (he also said he
wants the same code rewritten using groupby). I reproduced the logic of
his code... hopefully he can step in and clarify!






> Here's another solution that finds all the records that start on or after
> the given data (the poorly named "maxDate") and displays them sorted by
> date.
>
>
> selected = [rec for rec in obs if rec['realtime_start'] >= maxDate]
> selected.sort(key=lambda rec: rec['date'])
> print selected
>
>
>
>


--
Lark's Tongue Guide to Python: http://lightbird.net/larks/

A little bad taste is like a nice dash of paprika.
Dorothy Parker

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help with iterators

[Steven D'Aprano]

On 22/03/13 12:39, Mitya Sirenef wrote:


You can do it with groupby like so:


from itertools import groupby
from operator import itemgetter

maxDate = "2013-03-21"
mmax= list()

obs.sort(key=itemgetter('date'))

for k, group in groupby(obs, key=itemgetter('date')):
 group = [dob for dob in group if dob['realtime_start'] <= maxDate]
 if group:
 group.sort(key=itemgetter('realtime_start'))
 mmax.append(group[-1])

pprint.pprint(mmax)



This suffers from the same problem of finding six records instead of one,
and that four of the six have start dates before the given date instead
of after it.

Here's another solution that finds all the records that start on or after
the given data (the poorly named "maxDate") and displays them sorted by
date.


selected = [rec for rec in obs if rec['realtime_start'] >= maxDate]
selected.sort(key=lambda rec: rec['date'])
print selected




--
Steven
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help with iterators

[Steven D'Aprano]

On 22/03/13 11:39, Matthew Johnson wrote:

Dear list,

I have been trying to understand out how to use iterators and in
particular groupby statements.  I am, however, quite lost.


groupby is a very specialist function which is not very intuitive to
use. Sometimes I think that groupby is an excellent solution in search
of a problem.



I wish to subset the below list, selecting the observations that have
an ID ('realtime_start') value that is greater than some date (i've
used the variable name maxDate), and in the case that there is more
than one such record, returning only the one that has the largest ID
('realtime_start').



The code that you show does not so what you describe here. The most
obvious difference is that it doesn't return or display a single record,
but shows multiple records.

In your case, it selects six records, four of which have a realtime_start
that occurs BEFORE the given maxDate.

To solve the problem you describe here, of finding at most a single
record, the solution is much simpler than what you have done. Prepare a
list of observations, sorted by realtime_start. Take the latest such
observation. If the realtime_start is greater than the maxDate, you have
your answer. If not, there is no answer.

The simplest solution is usually the best. The simpler your code, the fewer
bugs it will contain.


obs.sort(key=lambda rec: rec['realtime_start'])
rec = obs[-1]
if rec['realtime_start'] > maxDate:
print rec
else:
print "no record found"


which prints:

{'date': '2013-01-01', 'realtime_start': '2013-03-21', 'realtime_end': 
'-12-31', 'value': '231.222'}




--
Steven
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help with iterators

[Mitya Sirenef]

On 03/21/2013 08:39 PM, Matthew Johnson wrote:

Dear list,

>
> I have been trying to understand out how to use iterators and in
> particular groupby statements. I am, however, quite lost.
>
> I wish to subset the below list, selecting the observations that have
> an ID ('realtime_start') value that is greater than some date (i've
> used the variable name maxDate), and in the case that there is more
> than one such record, returning only the one that has the largest ID
> ('realtime_start').
>
> The code below does the job, however i have the impression that it
> might be done in a more python way using iterators and groupby
> statements.
>
> could someone please help me understand how to go from this code to
> the pythonic idiom?
>
> thanks in advance,
>
> Matt Johnson
>
> _
>
> ## Code example
>
> import pprint
>
> obs = [{'date': '2012-09-01',
> 'realtime_end': '2013-02-18',
> 'realtime_start': '2012-10-15',
> 'value': '231.951'},
> {'date': '2012-09-01',
> 'realtime_end': '2013-02-18',
> 'realtime_start': '2012-11-15',
> 'value': '231.881'},
> {'date': '2012-10-01',
> 'realtime_end': '2013-02-18',
> 'realtime_start': '2012-11-15',
> 'value': '231.751'},
> {'date': '2012-10-01',
> 'realtime_end': '-12-31',
> 'realtime_start': '2012-12-19',
> 'value': '231.623'},
> {'date': '2013-02-01',
> 'realtime_end': '-12-31',
> 'realtime_start': '2013-03-21',
> 'value': '231.157'},
> {'date': '2012-11-01',
> 'realtime_end': '2013-02-18',
> 'realtime_start': '2012-12-14',
> 'value': '231.025'},
> {'date': '2012-11-01',
> 'realtime_end': '-12-31',
> 'realtime_start': '2013-01-19',
> 'value': '231.071'},
> {'date': '2012-12-01',
> 'realtime_end': '2013-02-18',
> 'realtime_start': '2013-01-16',
> 'value': '230.979'},
> {'date': '2012-12-01',
> 'realtime_end': '-12-31',
> 'realtime_start': '2013-02-19',
> 'value': '231.137'},
> {'date': '2012-12-01',
> 'realtime_end': '-12-31',
> 'realtime_start': '2013-03-19',
> 'value': '231.197'},
> {'date': '2013-01-01',
> 'realtime_end': '-12-31',
> 'realtime_start': '2013-02-21',
> 'value': '231.198'},
> {'date': '2013-01-01',
> 'realtime_end': '-12-31',
> 'realtime_start': '2013-03-21',
> 'value': '231.222'}]
>
> maxDate = "2013-03-21"
>
> dobs = dict([(d, []) for d in set([e['date'] for e in obs])])
>
> for o in obs:
> dobs[o['date']].append(o)
>
> dobs_subMax = dict([(k, [d for d in v if d['realtime_start'] <= maxDate])
> for k, v in dobs.items()])
>
> rts = lambda x: x['realtime_start']
>
> mmax = [sorted(e, key=rts)[-1] for e in dobs_subMax.values() if e]
>
> mmax.sort(key = lambda x: x['date'])
>
> pprint.pprint(mmax)
> ___
> Tutor maillist - Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>


You can do it with groupby like so:


from itertools import groupby
from operator import itemgetter


maxDate = "2013-03-21"
mmax= list()

obs.sort(key=itemgetter('date'))

for k, group in groupby(obs, key=itemgetter('date')):
group = [dob for dob in group if dob['realtime_start'] <= maxDate]
if group:
group.sort(key=itemgetter('realtime_start'))
mmax.append(group[-1])

pprint.pprint(mmax)


Note that writing multiply-nested comprehensions like you did results in
very unreadable code. Do you find this code more readable?

 -m


--
Lark's Tongue Guide to Python: http://lightbird.net/larks/

Many a man fails as an original thinker simply because his memory it too
good.  Friedrich Nietzsche

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help related to unicode using python

[शंतनू]

Reply inline.
On 21/03/13 12:18 AM, Steven D'Aprano wrote:
> On 20/03/13 22:38, nishitha reddy wrote:
>> Hi all
>> i'm working with unicode using python
>> i have some txt files in telugu i want to split all the lines of that
>> text files in to words of telugu
>> and i need to classify  all of them using some identifiers.can any one
>> send solution for that
>
>
> Probably not. I would be surprised if anyone here knows what Telugu is,
> or the rules for splitting Telugu text into words. The Natural Language
> Toolkit (NLTK) may be able to handle it.
>
> You could try doing the splitting and classifying yourself. If Telugu
> uses
> space-delimited words like English, you can do it easily:
>
> data = u"ఏఐఒ ఓఔక ఞతణథ"
> words = data.split()
Unicode characters for telugu:
http://en.wikipedia.org/wiki/Telugu_alphabet#Unicode


On python 3.x,

>>> import re
>>> a='ఏఐఒ ఓఔక ఞతణథ'
>>> print(a)
ఏఐఒ ఓఔక ఞతణథ
>>> re.split('[^\u0c01-\u0c7f]', a)
['ఏఐఒ', 'ఓఔక', 'ఞతణథ']

Similar logic can be used for any other Indic script.

HTH.

-- 
शंतनू
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[Alan Gauld]

On 20/03/13 19:57, travis jeanfrancois wrote:

I create a function that allows the user to a create sentence by
  inputing  a string and to end the sentence with a  period meaning
inputing "." .The problem is while keeps overwriting the previuos input


'While' does not do any such thing. Your code is doing that all by 
itself. What while does is repeat your code until a condition

becomes false or you explicitly break out of the loop.


Here is my code:

def B1():


Try to give your functions names that describe what they do.
B1() is meaningless, readSentence() would be better.



  period = "."
  # The variable period is assigned


Its normal programming practice to put the comment above
the code not after it. Also comments should indicate why you
are doing something not what you are doing - we can see that
from the code.


  first = input("Enter the first word in your sentence ")
  next1 = input("Enter the next word in you sentence or enter period:")



  # I need store the value so when while overwrites next1 with the next
input the previous input is stored and will print output when I call it
later along with last one
  # I believe the solution is some how implenting this expression x = x+
variable


You could be right. Addition works for strings as well as numbers.
Although there are other (better) options but you may not have covered 
them in your class yet.



  while  next1 != (period) :


You don;t need the parentheses around period.
Also nextWord might be a better name than next1.
Saving 3 characters of typing is not usually worthwhile.


 next1  = input("Enter the next word in you sentence or enter period:")


Right, here you are overwriting next1. It's not the while's
fault - it is just repeating your code. It is you who are
overwriting the variable.

Notice that you are not using the first that you captured?
Maybe you should add next1 to first at some point? Then you
can safely overwrite next1 as much as you like?


 if next1 == (period):


Again you don;t need the parentheses around period


 next1 = next1 + period


Here, you add the period to next1 which the 'if' has
already established is now a period.


 print ("Your sentence is:",first,next1,period)


And now you print out the first word plus next1 (= 2 periods) plus a 
period = 3 periods in total... preceded by the phrase "Your sentence 
is:" This tells us that the sample output you posted is not from this 
program... Always match the program and the output when debugging or you 
will be led seriously astray!



PS : The" #"  is I just type so I can understand what each line does


The # is a comment marker. Comments are a very powerful tool that 
programmers use to explain to themselves and other programmers

why they have done what they have.

When trying to debug faults like this it is often worthwhile
grabbing a pen and drawing a chart of your variables and
their values after each time round the loop.
In this case it would have looked like

iteration   period  first   next1
0   .   I   am
1   .   I   a
2   .   I   novice
3   .   I   ..

If you aren't sure of the values insert a print statement
and get the program to tell you, but working it out in
your head is more likely to show you the error.


HTH,

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[Robert Sjoblom]

On Mar 20, 2013 10:49 p.m., "xDog Walker"  wrote:
>
> On Wednesday 2013 March 20 13:39, Robert Sjoblom wrote:
> > A word of advice: next is a keyword in python
>
> ~/Packages/Python/Notable-0.1.5b> python
> Python 2.5 (r25:51908, May 25 2007, 16:14:04)
> [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import keyword
> >>> keyword.iskeyword('next')
> False
> >>>
> 14:44 Wed 2013 Mar 20
> ~/Packages/Python/Notable-0.1.5b> python2.7
> Python 2.7.2 (default, Oct 10 2011, 10:47:36)
> [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import keyword
> >>> keyword.iskeyword('next')
> False
> >>>
> 14:44 Wed 2013 Mar 20
> ~/Packages/Python/Notable-0.1.5b> python3.3
> Python 3.3.0 (default, Sep 30 2012, 09:02:56)
> [GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import keyword
> >>> keyword.iskeyword('next')
> False
> >>>
>
> --
> Yonder nor sorghum stenches shut ladle gulls stopper torque wet
> strainers.
Fine, it's a method, my bad.
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[xDog Walker]

On Wednesday 2013 March 20 13:39, Robert Sjoblom wrote:
> A word of advice: next is a keyword in python

~/Packages/Python/Notable-0.1.5b> python
Python 2.5 (r25:51908, May 25 2007, 16:14:04)
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import keyword
>>> keyword.iskeyword('next')
False
>>>
14:44 Wed 2013 Mar 20
~/Packages/Python/Notable-0.1.5b> python2.7
Python 2.7.2 (default, Oct 10 2011, 10:47:36)
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import keyword
>>> keyword.iskeyword('next')
False
>>>
14:44 Wed 2013 Mar 20
~/Packages/Python/Notable-0.1.5b> python3.3
Python 3.3.0 (default, Sep 30 2012, 09:02:56)
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import keyword
>>> keyword.iskeyword('next')
False
>>>

-- 
Yonder nor sorghum stenches shut ladle gulls stopper torque wet 
strainers.

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[Dave Angel]

On 03/20/2013 03:57 PM, travis jeanfrancois wrote:

Hello, I am a beginning python student and I am having trouble with a
program I am writing  . The problem requires me to use "while" and that I
create a function that allows the user to a create sentence by  inputing  a
string and to end the sentence with a  period meaning inputing "." .The
problem is while keeps overwriting the previuos input and it still asks for
a string even after it prints out  .

Here is the output I am getting


Enter the first word in your sentence: I
Enter the next word in your sentence: am
Enter the next word in your sentence: a
Enter the next word in your sentence: novice
Enter the next word in your sentence: .
I . .
Enter the next word in your sentence:


Here is the desired output:
   :
Enter the first word in your sentence: I
Enter the next word in your sentence: am
Enter the next word in your sentence: a
Enter the next word in your sentence: novice
Enter the next word in your sentence: .
I am a novice.

Here is my code:





def B1():
  #Creates a function called B1
  period = "."
  # The variable period is assigned
  first = input("Enter the first word in your sentence ")
  #The variable first is assigned
  next1 = input("Enter the next word in you sentence or enter period:")
  #The variable next 1 is assigned

  # I need store the value so when while overwrites next1 with the next
input the previous input is stored and will print output when I call it
later along with last one
  # I believe the solution is some how implenting this expression x = x+
variable


You need a new variable that accumulates the whole sentence.  I'd use a 
list, but many people would use a string.  Since I don't know what 
concepts you know yet, I'll stick to string here.  Anyway, you have to 
initialize it before the loop, and then you can print it after the loop.


sentence = ""



  while  next1 != (period) :

 next1  = input("Enter the next word in you sentence or enter period:")


At this point, add the word to the sentence.


 if next1 == (period):
 next1 = next1 + period
 print ("Your sentence is:",first,next1,period)


No need for these three lines inside the loop, since the loop will end 
when next1 is equal to the period.  So put the print after the end of 
the loop, and I'll let you figure out what it should print.




PS : The" #"  is I just type so I can understand what each line does




--
DaveA
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[Robert Sjoblom]

> Hello, I am a beginning python student and I am having trouble with a
> program I am writing.
Hello, and welcome. Since you don't say if this is an assignment or
not, I will just point you in the right direction, and point out a few
things you might make use of.

> def B1():
>  period = "."

You don't actually need to store a period anywhere, because when your
while loop initiates, you can just do:
while next1 != "."
A word of advice: next is a keyword in python, so 'next1' might not be
a great variable name.

>  # I need store the value so when while overwrites next1 with the next input
> the previous input is stored and will print output when I call it later
> along with last one
>  # I believe the solution is some how implenting this expression x = x+
> variable
>  while  next1 != (period) :
>
> next1  = input("Enter the next word in you sentence or enter period:")
>
> if next1 == (period):
> next1 = next1 + period
> print ("Your sentence is:",first,next1,period)

Your code will never terminate, because:
program initiates. while loop begins.
Enter a few words, then decide to end with a period.
if-branch executes, because next1 is a period.
next1 becomes next1 + period #which is ..
while loop checks to see if next1 is a period, which it isn't, and runs again.

Furthermore, you are continually overwriting next1 until you type a
period. Consider the following output (I have added some spaces to the
important parts, so as to make them stand out):
>>>
Enter the first word in your sentence I
Enter the next word in you sentence or enter period:am
Entering while loop. next1 is: am
Enter the next word in you sentence or enter period:a
next1 is: a
Entering while loop. next1 is: a
Enter the next word in you sentence or enter period:novice
next1 is: novice
Entering while loop. next1 is: novice
Enter the next word in you sentence or enter period:.
next1 is: .
next1 is a period, now running next1 + period line:
..
Entering while loop. next1 is: ..

If you don't have to use strings for this program, I would suggest you
check out lists, and especially list.append(). It is possible to write
a program that does what you want, but it'd be a convoluted solution.

-- 
best regards,
Robert S.
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help related to unicode using python

[Steven D'Aprano]

On 20/03/13 22:38, nishitha reddy wrote:

Hi all
i'm working with unicode using python
i have some txt files in telugu i want to split all the lines of that
text files in to words of telugu
and i need to classify  all of them using some identifiers.can any one
send solution for that



Probably not. I would be surprised if anyone here knows what Telugu is,
or the rules for splitting Telugu text into words. The Natural Language
Toolkit (NLTK) may be able to handle it.

You could try doing the splitting and classifying yourself. If Telugu uses
space-delimited words like English, you can do it easily:

data = u"ఏఐఒ ఓఔక ఞతణథ"
words = data.split()

As for classifying the words, I have no idea, sorry.


--
Steven
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help related to unicode using python

[Mark Lawrence]

On 20/03/2013 11:38, nishitha reddy wrote:

Hi all
i'm working with unicode using python
i have some txt files in telugu i want to split all the lines of that
text files in to words of telugu
and i need to classify  all of them using some identifiers.can any one
send solution for that
 thank u
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor



Sorry but we don't work like that.  You write some code and when you get 
problems ask for help.


I'd strongly suggest using Python 3.3 if you can for your processing. 
It's vastly superior to earlier, buggy unicode implementations in Python.


--
Cheers.

Mark Lawrence

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with itertools.izip_longest

[Abhishek Pratap]

On Sat, Mar 16, 2013 at 2:53 PM, Peter Otten <__pete...@web.de> wrote:
> Abhishek Pratap wrote:
>
>> I am trying to use itertools.izip_longest to read a large file in
>> chunks based on the examples I was able to find on the web. However I
>> am not able to understand the behaviour of the following python code.
>> (contrived form of example)
>>
>>
>>
>> for x in itertools.izip_longest(*[iter([1,2,3])]*2):
>> print x
>>
>>
>> ###output:
>> (1, 2)
>> (3, None)
>>
>>
>> It gives me the right answer but I am not sure how it is doing it. I
>> also referred to the itertools doc but could not comprehend much. In
>> essence I am trying to understand the intracacies of the following
>> documentation from the itertools package.
>>
>> "The left-to-right evaluation order of the iterables is guaranteed.
>> This makes possible an idiom for clustering a data series into
>> n-length groups using izip(*[iter(s)]*n)."
>>
>> How is *n able to group the data and the meaning of '*' in the
>> beginning just after izip.
>
> Break the expression into smaller chunks:
>
> items = [1, 2, 3]
> it = iter(items)
> args = [it] * 2 # same as [it, it]
> chunks = itertools.izip_longest(*args) # same as izip_longest(it, it)
>
> As a consequence of passing the same iterator twice getting the first item
> from the "first" iterator will advance the "second" iterator (which is
> actually the same as the first iterator) to the second item which will in
> turn advance the "first" iterator to the third item. Try to understand the
> implementation given for izip() at
>

Thanks Peter. I guess I missed the trick on how each iterator will be
moved ahead automatically as the are basically same, replicated N
times.

-Abhi


> http://docs.python.org/2/library/itertools.html#itertools.izip
>
> before you proceed to izip_longest().
>
> ___
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with itertools.izip_longest

[Peter Otten]

Abhishek Pratap wrote:

> I am trying to use itertools.izip_longest to read a large file in
> chunks based on the examples I was able to find on the web. However I
> am not able to understand the behaviour of the following python code.
> (contrived form of example)
> 
> 
> 
> for x in itertools.izip_longest(*[iter([1,2,3])]*2):
> print x
> 
> 
> ###output:
> (1, 2)
> (3, None)
> 
> 
> It gives me the right answer but I am not sure how it is doing it. I
> also referred to the itertools doc but could not comprehend much. In
> essence I am trying to understand the intracacies of the following
> documentation from the itertools package.
> 
> "The left-to-right evaluation order of the iterables is guaranteed.
> This makes possible an idiom for clustering a data series into
> n-length groups using izip(*[iter(s)]*n)."
> 
> How is *n able to group the data and the meaning of '*' in the
> beginning just after izip.

Break the expression into smaller chunks:

items = [1, 2, 3]
it = iter(items)
args = [it] * 2 # same as [it, it]
chunks = itertools.izip_longest(*args) # same as izip_longest(it, it)

As a consequence of passing the same iterator twice getting the first item 
from the "first" iterator will advance the "second" iterator (which is 
actually the same as the first iterator) to the second item which will in 
turn advance the "first" iterator to the third item. Try to understand the 
implementation given for izip() at

http://docs.python.org/2/library/itertools.html#itertools.izip

before you proceed to izip_longest().

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with itertools.izip_longest

[Abhishek Pratap]

On Sat, Mar 16, 2013 at 2:32 PM, Oscar Benjamin
 wrote:
> On 16 March 2013 21:14, Abhishek Pratap  wrote:
>> Hey Guys
>>
>> I am trying to use itertools.izip_longest to read a large file in
>> chunks based on the examples I was able to find on the web. However I
>> am not able to understand the behaviour of the following python code.
>> (contrived form of example)
>>
>> for x in itertools.izip_longest(*[iter([1,2,3])]*2):
>> print x
>>
>>
>> ###output:
>> (1, 2)
>> (3, None)
>>
>>
>> It gives me the right answer but I am not sure how it is doing it. I
>> also referred to the itertools doc but could not comprehend much. In
>> essence I am trying to understand the intracacies of the following
>> documentation from the itertools package.
>>
>> "The left-to-right evaluation order of the iterables is guaranteed.
>> This makes possible an idiom for clustering a data series into
>> n-length groups using izip(*[iter(s)]*n)."
>>
>> How is *n able to group the data and the meaning of '*' in the
>> beginning just after izip.
>
> The '*n' part is to multiply the list so that it repeats. This works
> for most sequence types in Python:
>
 a = [1,2,3]
 a * 2
> [1, 2, 3, 1, 2, 3]
>
> In this particular case we multiply a list containing only one item,
> the iterator over s. This means that the new list contains the same
> element twice:
 it = iter(a)
 [it]
> []
 [it] * 2
> [, ]
>
> So if every element of the list is the same iterator, then we can call
> next() on any of them to get the same values in the same order:
 d = [it]*2
 d
> [, ]
 next(d[1])
> 1
 next(d[0])
> 2
 next(d[0])
> 3
 next(d[0])
> Traceback (most recent call last):
>   File "", line 1, in 
> StopIteration
 next(d[1])
> Traceback (most recent call last):
>   File "", line 1, in 
> StopIteration
>
> The * just after izip is for argument unpacking. This allows you to
> call a function with arguments unpacked from a list:
>
 def f(x, y):
> ... print('x is %s' % x)
> ... print('y is %s' % y)
> ...
 f(1, 2)
> x is 1
> y is 2
 args = [1,2]
 f(args)
> Traceback (most recent call last):
>   File "", line 1, in 
> TypeError: f() takes exactly 2 arguments (1 given)
 f(*args)
> x is 1
> y is 2
>
> So the original expression, izip(*[iter(s)]*2), is another way of writing
>
> it = iter(s)
> izip(it, it)
>
> And izip(*[iter(s)]*10) is equivalent to
>
> izip(it, it, it, it, it, it, it, it, it, it)
>
> Obviously writing it out like this will get a bit unwieldy if we want
> to do izip(*[iter(s)]*100) so the preferred method is
> izip(*[iter(s)]*n) which also allows us to choose what value to give
> for n without changing anything else in the code.
>
>
> Oscar


Thanks a bunch Oscar. This is why I love this community. It is
absolutely clear now. It is funny I am getting the solution over the
mailing list while I am at pycon :)


best,
-Abhi
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with itertools.izip_longest

[Oscar Benjamin]

On 16 March 2013 21:14, Abhishek Pratap  wrote:
> Hey Guys
>
> I am trying to use itertools.izip_longest to read a large file in
> chunks based on the examples I was able to find on the web. However I
> am not able to understand the behaviour of the following python code.
> (contrived form of example)
>
> for x in itertools.izip_longest(*[iter([1,2,3])]*2):
> print x
>
>
> ###output:
> (1, 2)
> (3, None)
>
>
> It gives me the right answer but I am not sure how it is doing it. I
> also referred to the itertools doc but could not comprehend much. In
> essence I am trying to understand the intracacies of the following
> documentation from the itertools package.
>
> "The left-to-right evaluation order of the iterables is guaranteed.
> This makes possible an idiom for clustering a data series into
> n-length groups using izip(*[iter(s)]*n)."
>
> How is *n able to group the data and the meaning of '*' in the
> beginning just after izip.

The '*n' part is to multiply the list so that it repeats. This works
for most sequence types in Python:

>>> a = [1,2,3]
>>> a * 2
[1, 2, 3, 1, 2, 3]

In this particular case we multiply a list containing only one item,
the iterator over s. This means that the new list contains the same
element twice:
>>> it = iter(a)
>>> [it]
[]
>>> [it] * 2
[, ]

So if every element of the list is the same iterator, then we can call
next() on any of them to get the same values in the same order:
>>> d = [it]*2
>>> d
[, ]
>>> next(d[1])
1
>>> next(d[0])
2
>>> next(d[0])
3
>>> next(d[0])
Traceback (most recent call last):
  File "", line 1, in 
StopIteration
>>> next(d[1])
Traceback (most recent call last):
  File "", line 1, in 
StopIteration

The * just after izip is for argument unpacking. This allows you to
call a function with arguments unpacked from a list:

>>> def f(x, y):
... print('x is %s' % x)
... print('y is %s' % y)
...
>>> f(1, 2)
x is 1
y is 2
>>> args = [1,2]
>>> f(args)
Traceback (most recent call last):
  File "", line 1, in 
TypeError: f() takes exactly 2 arguments (1 given)
>>> f(*args)
x is 1
y is 2

So the original expression, izip(*[iter(s)]*2), is another way of writing

it = iter(s)
izip(it, it)

And izip(*[iter(s)]*10) is equivalent to

izip(it, it, it, it, it, it, it, it, it, it)

Obviously writing it out like this will get a bit unwieldy if we want
to do izip(*[iter(s)]*100) so the preferred method is
izip(*[iter(s)]*n) which also allows us to choose what value to give
for n without changing anything else in the code.


Oscar
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[Steven D'Aprano]

On 14/03/13 02:12, Joshua Wilkerson wrote:

Can you help me with something? This code (it also draws from the text_game 
file) says it has a syntax error, but I can't seem to find what it is, I think 
the code is having a fit but I'm not sure. I'm appreciative to all hep.



The most valuable help we can give you is to teach you to help yourself, and to 
learn what not to do. Here are some Do Nots:

- Do not expect us to read through hundreds of lines of code looking for the 
error.

- Do not expect us to save your files and then run them. We have no idea what 
they will do, you might be trying to trick us into running harmful code. Unless 
we read through all your code and study it carefully, we can't know if it is 
safe.

- Even if we trust you AND trust your code, we're volunteers, not servants. We're only 
going to install your code and run it if you pay us, or if your problem seems so 
interesting that we want to solve the problem no matter how much work it takes. 
Unfortunately, "a syntax error" does not sound interesting.

- Don't assume that Python is "having a fit". Trust me, hundreds of thousands 
or millions of people have used Python for 20+ years now. No software is perfect and bug 
free, but trust me, the chances that you have discovered a bug that nobody before you has 
ever seen is remote. 99.99% of the bugs you experience as a programmer will be bugs in 
*your* code, not the language. (But don't worry, you'll soon learn to fix those bugs so 
quickly you won't even remember them.)


And here are some Dos:


- The most valuable thing you can do right now is learn how to read and 
understand the error messages that Python gives you. There is a lot of 
information buried in them. And usually not buried very deeply, often all you 
need to do is read it and it will tell you what went wrong. (At least once you 
get experiences enough to know how to interpret the error.) Compared to some 
other languages, Python's error messages are a paragon of clarity and 
simplicity.

See below for more on this one.

- If you have trouble with an error that you can't solve yourself, make it easy 
for us to help you:

  * The absolute LEAST you need to do is copy and paste the entire
traceback, starting with the line "Traceback (most recent call last)"
all the way to the end, including the error message. SyntaxErrors may
not have a Traceback line, but you should still copy and paste the
entire message.

  * Better still, if you can, try to SIMPLIFY the problem to the smallest
amount of code that displays the same error. Nine times out of ten, by
going through this process of simplifying the code, *you* will discover
what the error was, and solve the problem yourself. The tenth time, you
will then have a nice, simple piece of code that you can show us,
instead of hundreds and hundreds of lines that we won't read.

See this website for more detail:

http://sscce.org/

Although it is written for Java programmers, the lessons it gives apply
to any language.

  * Remember to mention what version of Python you are using, and what
operating system. (Windows, Linux, Mac, something else?) If you are
using a less common Python compiler, like IronPython or Jython, say so.
If you are running your code via an IDE like IDLE or IPython, say so.



Now for this specific error. You are getting a SyntaxError. Unfortunately, 
syntax errors sometimes give the least informative error messages in Python. 
But fortunately you can still work out what is wrong:


py> for x = range(1, 2):
  File "", line 1
for x = range(1, 2):
  ^
SyntaxError: invalid syntax


Notice the small caret ^ on a line on its own? In your email, it may not line up correctly, but if 
you read the error in context, in the Python compiler or IDE where it occurs, it will line up with 
the first thing that Python found that was broken syntax. In this case, you simply cannot use 
assignment, "x = something", inside the for line. The right syntax is "for x in 
range(1, 20)".

Here's another example:


py> x = 23*)1+5)
  File "", line 1
x = 23*)1+5)
   ^
SyntaxError: invalid syntax


Here the caret should line up under the left-most parenthesis (round bracket). 
The solution is to use the open-bracket, not close-bracket.


A common error is to use too few closing brackets.

py> x = 23*(1 + (15 - 7)
... y = x + 1
  File "", line 2
y = x + 1
^
SyntaxError: invalid syntax


See what happens here? The error, the missing bracket, is on the *previous* 
line. That's because Python cannot tell that it is truly missing until it gets 
to the next line. So if you have a Syntax Error on a line that looks right, or 
that is a comment, *work backwards*, line by line, until you find something 
that is missing a closing bracket.



--
Steven
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.o

Re: [Tutor] Help

[Oscar Benjamin]

On 13 March 2013 15:12, Joshua Wilkerson  wrote:
> Can you help me with something? This code (it also draws from the text_game
> file) says it has a syntax error, but I can't seem to find what it is, I
> think the code is having a fit but I'm not sure. I'm appreciative to all
> hep.

Could you perhaps copy and paste the entire error message here?
Usually it says the line on which the error occurs, shows that line
and a pointer to where there error is, e.g.:

$ python tmp.py
  File "tmp.py", line 9
[count+=1 for n in range()]
   ^
SyntaxError: invalid syntax


Oscar
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[Alan Gauld]

On 13/03/13 15:12, Joshua Wilkerson wrote:

Can you help me with something? This code (it also draws from the
text_game file) says it has a syntax error,



Don't make us guess, post the error message.
It will tell us where.

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with storing money variable

[Alan Gauld]

On 19/02/13 12:36, Ghadir Ghasemi wrote:


def printMenu():
 print ("|__|")
 print ("|  2. Insert 10p   |")
 print ("|  3. Insert 20p   |")
 print ("|  4. Insert 50p   |")
 print ("|__|")

while True:
 elif choice == '2':
 money = 0
 number = int(input("how many 10p: "))
 money += number * 1/10
 elif choice == '3':
 money = 0
 number2  = int(input("how many 20p: "))
 money += number2 * 2/10
 elif choice == '4':
 money = 0
 number3 = int(input("how many 50p: "))
 money += number3 * 5/10


In each case you start by zeroing money thus losing any credit they
had built up. If a real machine did that to me I'd me mighty annoyed.

Just a thought...

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with storing money variable

[Dave Angel]

On 02/19/2013 07:36 AM, Ghadir Ghasemi wrote:

Hi guys, Iam halfway through my vending machine program that I started earlier. 
I ran into a problem. When the user inserts some money, The money variable is 
not stored for until the user buys an item. So what happens is when the users 
inserts some coins and then trys to buy an item the money they inserted is not 
stored till they buy item.Can you tell me how this can be overcome, so that 
when the user trys to buy an item,the vending machine correctly looks at the 
amount of money they have and vends the item depending on the amound of money 
they have.  Here is the code:



def printMenu():
 print ("|__|")
 print ("|Menu: |")
 print ("|--|")
 print ("|  1. Display all Items|")
 print ("|  2. Insert 10p   |")
 print ("|  3. Insert 20p   |")
 print ("|  4. Insert 50p   |")
 print ("|  5. Insert £1|")
 print ("|  6. Buy an item  |")
 print ("|  7. Print Current Amount |")
 print ("|  8. Exit |")
 print ("|__|")

while True:
 printMenu()
 choice = input("enter an option from the menu: ")



 if choice == '1':
 print("")
 print(" A  BC")
 print("  1.[ Vimtos ] [ Chewits ] [ Mars Bar ]")
 print("[  50p   ] [  40p] [  50p ]")
 print("")
 print("  2.[ Doritos ] [ Mentos ]")
 print("[  60p] [  50p   ]")
 print("")



 elif choice == '2':
 money = 0
 number = int(input("how many 10p: "))
 money += number * 1/10
 print("your newly updated credit is £" + str(money) + "0")


 elif choice == '3':
 money = 0
 number2  = int(input("how many 20p: "))
 money += number2 * 2/10
 print("your newly updated credit is £" + str(money) + "0")


 elif choice == '4':
 money = 0
 number3 = int(input("how many 50p: "))
 money += number3 * 5/10
 print("your newly updated credit is £" + str(money) + "0")


 elif choice == '5':
 money = 0
 number4 = int(input("how many £1: "))
 money += number4 * 1
 print("your newly updated credit is £" + str(money))



 elif choice == '6':
 code = input("Enter the code of item you want to buy e.g. for Vimtos = a1: 
")
 money = 0
 pricea1 = 0.50
 pricea2 = 0.60
 priceb1 = 0.40
 priceb2 = 0.50
 pricec1 = 0.50

 if code == 'a1':

 if money > pricea1:
 print("you have bought a packet of Vimtos and your newly updated 
balance is " + str(money - pricea1))
 money -= pricea1
 else:
 print("you can't buy that item as your credit is too low")

 if code == 'a2':
 if money > pricea2:
 print("you have bought a packet of Doritos and your newly updated 
balance is" + str(money - pricea2))
 money -= pricea2
 else:
 print("you can't buy that item as your credit is too low")

 if code == 'b1':
 if money > priceb1:
 print("you have bought a packet of Chewits and your newly updated 
balance is" + str(money - priceb1))
 money -= priceb1
 else:
 print("you can't buy that item as your credit is too low")

 if code == 'b2':
 if money > priceb2:
 print("you have bought a packet of Mentos and your newly updated 
balance is" + str(money - pricea2))
 money -= priceb2
 else:
 print("you can't buy that item as your credit is too low")

 if code == 'c1':
 if money > pricec1:
 print("you have bought a Mars Bar and your newly updated balance 
is" + str(money - pricea2))
 money -= priceb2
 else:
 print("you can't buy that item as your credit is too low")


How did you conclude that the money they deposit isn't "stored" till 
they try to buy something?  Are you really saying it isn't visible to 
the user?  Could it be because you forgot the

elif code == "7"

case?  (And the "8" one as well.)

The other problem I see is that many of those choices zero the value 
bound to "money".  That should be zeroed before the while loop, not 
inside any place somebody deposits something.



--
DaveA
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with inch to cms conversion .

[Danny Yoo]

On Mon, Feb 11, 2013 at 9:06 AM, Pravya Reddy  wrote:
> Can you please help me with the code.
>
> #!/usr/bin/env python
> """
> inchtocm.py
>
> """
>
> def Inchtocm(inches):
> """Returns 2.54 * inches"""
> return (2.54 * float(inches_number1))


I don't know if your curriculum talks about writing test cases for
functions.  If your instructors do not mention it, ask them, because
it's a crucial concept.  And if they have no clue about it (which is
unfortunately possible), you probably will need to stretch a little to
learn about them yourself.



Python's default testing framework, unittest, unfortunately requires
knowledge on how to use "classes", which you haven't probably seen
yet.  And it's a bit heavyweight, to boot.

In lieu of that, you can use something simpler: just run your
Inchtocm() with a few sample inputs first, and "assert" that they have
the right value, like this:


def Inchtocm(inches):
"""Returns 2.54 * inches"""
return (2.54 * float(inches_number1))

assert Inchtocm(0) == 0


Note that we don't just call Inchtocm(), but check to see that it has
the right value.  This is important: otherwise, you are not really
"testing" the function, but just making it run.  The code above just
has one test: usually, you want to add a few more.  And you want to
write them _before_ you code up the function.
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with inch to cms conversion .

[Dave Angel]

On 02/11/2013 11:06 AM, Pravya Reddy wrote:

Can you please help me with the code.

#!/usr/bin/env python
"""
inchtocm.py

"""


First, remove that try/except until the code is free of obvious bugs. 
It's masking where the error actually occurs.  Alternatively, include a 
variable there, and print the stack trace yourself.






def Inchtocm(inches):
 """Returns 2.54 * inches"""
 return (2.54 * float(inches_number1))



As Joel pointed out, you're using a global instead of the parameter that 
was passed.  Call float() on  inches, not on some non-local variable.




inches = None
while True:
 try:
 inches_number1 = input(input("How many inches you want to convert:
"))


Calling input(input())  doesn't do any favors.  It echoes the first 
response, and waits for another one.  The user doesn't probably realize 
that he has to type the number 455 twice.



 inches = float(inches_number1)


Since you're presumably getting the exception on this line, you should 
print out the value you're trying to convert.  You can remove the print 
after it works.



 print ("You got", Inchtocm(inches), "cm.")
 print ("You converted", inches, "inches to cm.")
 break
 except ValueError:
 print ("This is not a number!")

The code is incomplete and i am not getting a proper output:

How many inches you want to convert: 455
455
This is not a number!
How many inches you want to convert:


--
DaveA

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with running perl script that writes to a text file

[eryksun]

On Wed, Feb 6, 2013 at 12:47 PM, Alan Gauld  wrote:
> so "the DOS prompt" is both traditional and sufficiently specific making it
> the most easily understandable of the likely terms.

"DOS prompt" is a common idiom, but it bears mentioning now and then
that the OS is NT [1], not DOS. That's all; I know I'm being pedantic.

Officially the Windows command-line shell is called the "command
prompt". I call it the shell [2] or command line. Unless someone says
PowerShell or 4NT, I assume it's cmd.

[1] Windows 8 is NT 6.2.9200
[2] Not the GUI shell, Explorer, which is set here:
HKLM\Software\Microsoft\Windows NT\CurrentVersion\WinLogon\Shell
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with running perl script that writes to a text file

[Alan Gauld]

On 06/02/13 10:58, eryksun wrote:


and pedantic comment about the habit of saying "DOS prompt". The cmd
shell is a Win32 console application, unlike DOS command.com.


Yes, but the problem is that Windows now has so many command prompts 
(cscript, cmd, power shell etc) that "the Windows prompt"

would be meaningless and "the cmd prompt" too awkward to say,
so "the DOS prompt" is both traditional and sufficiently specific making 
it the most easily understandable of the likely terms.


--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with running perl script that writes to a text file

[eryksun]

On Tue, Feb 5, 2013 at 6:44 PM, 3n2 Solutions <3n2soluti...@gmail.com> wrote:
>
> I want to automate the following manual process from DOS promp:

I agree with Peter's answer. I'd just like to add a generally useless
and pedantic comment about the habit of saying "DOS prompt". The cmd
shell is a Win32 console application, unlike DOS command.com. On
64-bit Windows there isn't even a virtual DOS machine (NTVDM) to run
command.com. There, I feel better now. :)
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with running perl script that writes to a text file

[Peter Otten]

3n2 Solutions wrote:

> Hello,
> 
> I want to automate the following manual process from DOS promp:
> 
> c:/scripts/perl>perl fix.pl base.gtx >base.txt
> 
> Here is my python script:
> 
> path="c:/scripts/perl/"
> subprocess.call(['perl','fix.pl','base.gtx >base.txt',path])
> 
> I also tried this alternative:
> 
> subprocess.Popen(['perl','fix.pl','base.gtx >base.txt',path]) #same
> result from this method.
> 
> The above script generates the base.txt file but has no content in it.
> 
> any ideas as to why the resulting text file is empty? Am I using the
> correct python commands to run the above manual process?

I'm surprised that base.txt is generated at all, I'd expect fix.pl to look 
for a file named "base.gtx >base.txt" and complain when it doesn't find 
that.

I think the following should work:

with open("c:/scripts/perl/base.txt", "w") as f:
subprocess.check_call(
["perl", 
 "c:/scripts/perl/fix.pl", 
 "c:/scripts/perl/base.gtx"], 
stdout=f)



___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help with running perl script that writes to a text file

[Alan Gauld]

On 05/02/13 23:44, 3n2 Solutions wrote:


I want to automate the following manual process from DOS promp:

c:/scripts/perl>perl fix.pl base.gtx >base.txt


Use a DOS batch file, that's what they are there for.

If you are not doing any other processing Python is inefficient and 
overkill for this task. Unless you just want to learn how to use Popen I 
suppose...




path="c:/scripts/perl/"
subprocess.call(['perl','fix.pl','base.gtx >base.txt',path])


Do you get any error messages on the console?
How are you running the python script?

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help- Regarding python

[Oscar Benjamin]

On 5 February 2013 05:08, eryksun  wrote:
> On Mon, Feb 4, 2013 at 7:21 PM, Oscar Benjamin
>  wrote:
>> eigenvalues, eigenvectors = np.linalg.eig(C)
>
> First sort by eigenvalue magnitude:
>
> >>> idx = np.argsort(eigenvalues)[::-1]
> >>> print idx
> [ 0  1  2  3  8 10 11 12 14 22 20 21 18 19 23 24 17 16 15 13  9  7  5  6  
> 4]
>
> >>> eigenvalues = eigenvalues[idx]
> >>> eigenvectors = eigenvectors[:, idx]
>
>> # 2D PCA - get the two eigenvectors with the largest eigenvalues
>> v1, v2 = eigenvectors[:,:2].T

Thanks. I thought that eig already sorted them. The doc claims says
that the values are "not necessarily ordered" but when I run it they
are in descending order of absolute value.

Also I should have used eigh since the covariance matrix is Hermitian
(eigh seems to give the eigenvalues in ascending order).


Oscar
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help- Regarding python

[eryksun]

On Mon, Feb 4, 2013 at 7:21 PM, Oscar Benjamin
 wrote:
> eigenvalues, eigenvectors = np.linalg.eig(C)

First sort by eigenvalue magnitude:

>>> idx = np.argsort(eigenvalues)[::-1]
>>> print idx
[ 0  1  2  3  8 10 11 12 14 22 20 21 18 19 23 24 17 16 15 13  9  7  5  6  4]

>>> eigenvalues = eigenvalues[idx]
>>> eigenvectors = eigenvectors[:, idx]

> # 2D PCA - get the two eigenvectors with the largest eigenvalues
> v1, v2 = eigenvectors[:,:2].T
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help- Regarding python

[Oscar Benjamin]

On 4 February 2013 06:24, Gayathri S  wrote:
> Hi All!
> If i have data set like this means...
>
> 3626,5000,2918,5000,2353,2334,2642,1730,1687,1695,1717,1744,593,502,493,504,449,431,444,444,429,10
> 438,498,3626,3629,5000,2918,5000,2640,2334,2639,1696,1687,1695,1717,1744,592,502,493,504,449,431,444,441,429,10
> 439,498,3626,3629,5000,2918,5000,2633,2334,2645,1705,1686,1694,1719,1744,589,502,493,504,446,431,444,444,430,10
> 440,5000,3627,3628,5000,2919,3028,2346,2330,2638,1727,1684,1692,1714,1745,588,501,492,504,451,433,446,444,432,10
> 444,5021,3631,3634,5000,2919,5000,2626,2327,2638,1698,1680,1688,1709,1740,595,500,491,503,453,436,448,444,436,10
> 451,5025,3635,3639,5000,2920,3027,2620,2323,2632,1706,1673,1681,1703,753,595,499,491,502,457,440,453,454,442,20
> 458,5022,3640,3644,5000,2922,5000,2346,2321,2628,1688,1666,1674,1696,744,590,496.

PCA only makes sense for multivariate data: your data should be a set
of vectors *all of the same length*. I'll assume that you were just
being lazy when you posted it and that you didn't bother to copy the
first and last lines properly...

[snip]
>
> Shall i use the following code for doing PCA on given input? could you tell
> me?

This code you posted is all screwed up. It will give you errors if you
try to run it.

Also I don't really know what you mean by "doing PCA". The code below
transforms your data into PCA space and plots a 2D scatter plot using
the first two principal components.

#!/usr/bin/env python
import numpy as np
from matplotlib import pyplot as plt

data = np.array([

[438,498,3626,3629,5000,2918,5000,2640,2334,2639,1696,1687,1695,1717,1744,592,502,493,504,449,431,444,441,429,10],

[439,498,3626,3629,5000,2918,5000,2633,2334,2645,1705,1686,1694,1719,1744,589,502,493,504,446,431,444,444,430,10],

[440,5000,3627,3628,5000,2919,3028,2346,2330,2638,1727,1684,1692,1714,1745,588,501,492,504,451,433,446,444,432,10],

[444,5021,3631,3634,5000,2919,5000,2626,2327,2638,1698,1680,1688,1709,1740,595,500,491,503,453,436,448,444,436,10],

[451,5025,3635,3639,5000,2920,3027,2620,2323,2632,1706,1673,1681,1703,753,595,499,491,502,457,440,453,454,442,20],
])

# Compute the eigenvalues and vectors of the covariance matrix
C = np.cov(data.T)
eigenvalues, eigenvectors = np.linalg.eig(C)

# 2D PCA - get the two eigenvectors with the largest eigenvalues
v1, v2 = eigenvectors[:,:2].T
# Project the data onto the two principal components
data_pc1 = [np.dot(v1, d) for d in data]
data_pc2 = [np.dot(v2, d) for d in data]

# Scatter plot in PCA space
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
ax.plot(data_pc1, data_pc2, 'x')
ax.set_xlabel(r'$PC_1$')
ax.set_ylabel(r'$PC_2$')
ax.legend(['data'])
plt.show()


Oscar
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help- Regarding python

[Danny Yoo]

> How to do PCA on this data? if it is in array how to do that? and also how
> to use princomp() in PCA?


Principal component analysis,

http://en.wikipedia.org/wiki/Principal_component_analysis

may not be "built in".  Do you know for sure that it is?  According to
this blog entry, you can do it in numpy by coding the algorithm:


http://glowingpython.blogspot.com/2011/07/principal-component-analysis-with-numpy.html

If you use Google and search for the term "Principal component
analysis Python", you should see several implementations of modules
that provide that algorithm.
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help- Regarding python

[Steven D'Aprano]

On 04/02/13 17:24, Gayathri S wrote:

Hi All!
 If i have data set like this means...

3626,5000,2918,5000,2353,2334,2642,[...],496.


No need to dump your entire data set on us. Just a few representative
values will do.



How to do PCA on this data? if it is in array how to do that? and also how
to use princomp() in PCA?


What's PCA? What's princomp?



Shall i use the following code for doing PCA on given input? could you tell
me?


Have you tried it? What happens?

This is a list for people learning Python the programming language. We are not
experts on numpy, which is a specialist package for scientific use. We are not
statisticians either. You can probably assume that most of us know what
"standard deviation" is. Anything more complicated than that, you should ask
on a specialist numpy mailing list.

Good luck!



--
Steven
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help- Regarding python

[Alan Gauld]

On 04/02/13 06:24, Gayathri S wrote:

Hi All!
 If i have data set like this means...

3626,5000,2918,5000,2353,2334,2642,1730,1687,1695,1717,1744,593,502,493,504,449,431,444,444,429,10

...

458,5022,3640,3644,5000,2922,5000,2346,2321,2628,1688,1666,1674,1696,744,590,496.

How to do PCA on this data? if it is in array how to do that? and also
how to use princomp() in PCA?


No idea. I don't know what pca or princomp are.
It looks like they might be numpy or pylab functions in which case you 
probably will get better results posting on a forum for those modules.

This list is for learning the core language and standard library.

Having said that it looks like you could use some time learning the 
basics before delving into numpy etc. comments below...



from numpy import mean,cov,double,cumsum,dot,linalg,array,rank
from pylab import plot,subplot,axis,stem,show,figure
A = array([ [2.4,0.7,2.9,2.2,3.0,2.7,1.6,1.1,1.6,0.9],
 [2.5,0.5,2.2,1.9,3.1,2.3,2,1,1.5,1.1] ])
M = (A-mean(A.T,axis=1)).T[latent,coeff] = linalg.eig(cov(M))
score = dot(coeff.T,M)
return coeff,score,latent


You have a return that is not inside a function. That makes no sense
and in fact I get a syntax error so presumably you haven't actually 
tried running this code.



princomp(A):


This calls princomp() but does nothing with the return values


coeff, score, latent = princomp(A.T)


This calls princomp() and stores 3 return values.
Its unusual for a function to have such different semantics.
Which is correct?


figure()
subplot(121)


Again calling functions without storing values. It may be valid
but looks unlikely...


m = mean(A,axis=1)
plot([0, -coeff[0,0]*2]+m[0], [0, -coeff[0,1]*2]+m[1],'--k')
plot([0, coeff[1,0]*2]+m[0], [0, coeff[1,1]*2]+m[1],'--k')
plot(A[0,:],A[1,:],'ob') # the data
axis('equal')
subplot(122)
plot(score[0,:],score[1,:],'*g')
axis('equal')
plt.show()


Here you use plt but plt is not defined anywhere in your program.

I think you need to go back to Python basics and learn
how to write basic code before trying to use the more
exotic modules.

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[Alan Gauld]

On 02/02/13 01:47, Jack Little wrote:


def simpstart():
   global ammo1
   global ammo2
   global ammo3
   global health
   global tech_parts
   global exp
   global radio_parts
   ammo1=10
   ammo2=0
   ammo3=0
   health=100
   tech_parts=0
   exp=0
   radio_parts=0


This function is completely pointless, you might as well
just define the variables at the top level.


print "You awake in a haze. A crate,a door and a radio."
g1 = raw_input("Which do you choose  ")
if g1 == "CRATE" or g1 == "Crate" or g1 == "crate":

...

elif g1 =="DOOR" or g1 == "Door" or g1 == "door":
   print "You are outside"
elif g1 == "RADIO" or g1 == "Radio" or g1 == "radio":

...

g2 = raw_input("So this is NYC.Ten years after.There are a few
streets.Go west or north  ")
if g2 == "WEST" or g2 == "West" or g2 == "west":
   path2_pt1()
elif g2 == "NORTH" or g2 == "North" or g2 == "north":
   path1pt1()


The block above is at top level so Python will execute it as it reads 
the file. And at this stage pathpt1 does not exist so it fails. You need 
to move this block into a function (maybe it was intended to be part of 
the one above but you messed up the indent?). Alternatively you need to 
move the definition of pathpt1 above this block.



def path1pt1():
 print "This is where it all started. Freedom Tower. A biotech firm
called Aesthos Biotechnology. Based here."
 print "I worked there."


HTH
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[Dave Angel]

On 02/01/2013 08:47 PM, Jack Little wrote:

I get this error

Traceback (most recent call last):
   File "C:\Users\Jack\Desktop\python\g.py", line 56, in 
 path1pt1()
NameError: name 'path1pt1' is not defined

With this amount of code:


def simpstart():
   global ammo1
   global ammo2
   global ammo3
   global health
   global tech_parts
   global exp
   global radio_parts
   ammo1=10
   ammo2=0
   ammo3=0
   health=100
   tech_parts=0
   exp=0
   radio_parts=0


You've stopped defining that function, and now are doing top-level code

This following stuff belongs in a function, probably called main()


print "You awake in a haze. A crate,a door and a radio."
g1 = raw_input("Which do you choose  ")
if g1 == "CRATE" or g1 == "Crate" or g1 == "crate":
 print "There is a pack of ammo,some food and an odd microchip"
 ammo1=ammo1 + 6
 health=health + 10
 tech_parts=tech_parts + 1
elif g1 =="DOOR" or g1 == "Door" or g1 == "door":
   print "You are outside"
elif g1 == "RADIO" or g1 == "Radio" or g1 == "radio":
   print "It's only a few parts"
   radio_parts=radio_parts+3
g2 = raw_input("So this is NYC.Ten years after.There are a few streets.Go west or 
north  ")
if g2 == "WEST" or g2 == "West" or g2 == "west":
   path2_pt1()
elif g2 == "NORTH" or g2 == "North" or g2 == "north":
   path1pt1()


Now, in top-level code, you're trying to call a function that hasn't 
been defined yet.  If you want to have complete freedom of order when 
you define your functions, don't put any top-level code except a tiny 
block at the end of the script.  No function may be called before it has 
been defined.  But inside a function, the call won't be made till the 
function is called.  So if the only calls happen at the end of the 
script, there'll never be such a problem.






def path1pt1():
 print "This is where it all started. Freedom Tower. A biotech firm called 
Aesthos Biotechnology. Based here."
 print "I worked there."



This should be the only non-trivial top-level code, and it should be at 
the end of the script.


if __name__ == "__main__":
simpstart()
main()


--
DaveA
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help

[Brandon]

You get the error because you call path1pt1() before it is defined.  Define
your path1pt1() method at the top of your code before simpstart().

Brandon

On Fri, Feb 1, 2013 at 5:47 PM, Jack Little  wrote:

> I get this error
>
> Traceback (most recent call last):
>   File "C:\Users\Jack\Desktop\python\g.py", line 56, in 
> path1pt1()
> NameError: name 'path1pt1' is not defined
>
> With this amount of code:
>
>
> def simpstart():
>   global ammo1
>   global ammo2
>   global ammo3
>   global health
>   global tech_parts
>   global exp
>   global radio_parts
>   ammo1=10
>   ammo2=0
>   ammo3=0
>   health=100
>   tech_parts=0
>   exp=0
>   radio_parts=0
> print "You awake in a haze. A crate,a door and a radio."
> g1 = raw_input("Which do you choose  ")
> if g1 == "CRATE" or g1 == "Crate" or g1 == "crate":
> print "There is a pack of ammo,some food and an odd microchip"
> ammo1=ammo1 + 6
> health=health + 10
> tech_parts=tech_parts + 1
> elif g1 =="DOOR" or g1 == "Door" or g1 == "door":
>   print "You are outside"
> elif g1 == "RADIO" or g1 == "Radio" or g1 == "radio":
>   print "It's only a few parts"
>   radio_parts=radio_parts+3
> g2 = raw_input("So this is NYC.Ten years after.There are a few streets.Go
> west or north  ")
> if g2 == "WEST" or g2 == "West" or g2 == "west":
>   path2_pt1()
> elif g2 == "NORTH" or g2 == "North" or g2 == "north":
>   path1pt1()
>
>
> def path1pt1():
> print "This is where it all started. Freedom Tower. A biotech firm
> called Aesthos Biotechnology. Based here."
> print "I worked there."
>
> ___
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>
>
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP-Regarding python

[bob gailer]

On 1/30/2013 1:51 AM, Gayathri S wrote:

I am sorry that you chose to ignore my request to start a new email with 
a relevant subject.


Please next time do so.

The easier you make it for us to help you the more likely we will want 
to help.


--
Bob Gailer
919-636-4239
Chapel Hill NC

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP-Regarding python

[spawgi]

missed a parenthesis, it should look like -
with open(, ) as :
//operation with the file.


On Wed, Jan 30, 2013 at 12:31 PM,  wrote:

> A safer approach would be -
> with open(,  as :
> //operation with the file.
>
> This way, you do not have to remember to close the file explicitly.
>
>
> On Wed, Jan 30, 2013 at 12:27 PM, Dave Angel  wrote:
>
>> On 01/30/2013 01:51 AM, Gayathri S wrote:
>>
>>> Hi All!
>>>   I don't know how to read text file in python. If the
>>> data
>>> values are stored in a text file format, for
>>> example(1,30,60,90,120...200)
>>> means what i would do for reading it in python. could you just explain
>>> it.
>>>
>>>
>>>
>> infile = open("filename", "rt")will open a text file
>>
>> line = infile.readline()will read one line from it, as a str
>>
>> After that, you can parse it anyway you like.
>>
>>
>>
>>
>> --
>> DaveA
>> __**_
>> Tutor maillist  -  Tutor@python.org
>> To unsubscribe or change subscription options:
>> http://mail.python.org/**mailman/listinfo/tutor
>>
>
>
>
> --
> http://spawgi.wordpress.com
> We can do it and do it better.
>



-- 
http://spawgi.wordpress.com
We can do it and do it better.
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP-Regarding python

[spawgi]

A safer approach would be -
with open(,  as :
//operation with the file.

This way, you do not have to remember to close the file explicitly.


On Wed, Jan 30, 2013 at 12:27 PM, Dave Angel  wrote:

> On 01/30/2013 01:51 AM, Gayathri S wrote:
>
>> Hi All!
>>   I don't know how to read text file in python. If the
>> data
>> values are stored in a text file format, for example(1,30,60,90,120...200)
>> means what i would do for reading it in python. could you just explain it.
>>
>>
>>
> infile = open("filename", "rt")will open a text file
>
> line = infile.readline()will read one line from it, as a str
>
> After that, you can parse it anyway you like.
>
>
>
>
> --
> DaveA
> __**_
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/**mailman/listinfo/tutor
>



-- 
http://spawgi.wordpress.com
We can do it and do it better.
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP-Regarding python

[Dave Angel]

On 01/30/2013 01:51 AM, Gayathri S wrote:

Hi All!
  I don't know how to read text file in python. If the data
values are stored in a text file format, for example(1,30,60,90,120...200)
means what i would do for reading it in python. could you just explain it.




infile = open("filename", "rt")will open a text file

line = infile.readline()will read one line from it, as a str

After that, you can parse it anyway you like.




--
DaveA
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[Gayathri S]

Hi all...!
I don't know how to import our own data sets in python. its
always importing the in built data sets. could you just tell me how to do
that...!


Thanks...!

On Mon, Jan 28, 2013 at 1:50 PM, Steven D'Aprano wrote:

> On 28/01/13 18:26, Gayathri S wrote:
>
>> Hi all..!
>> wanna know how to compile python script in python command
>> line,
>> and is there any need for setting path for python like JAVA? whats the
>> difference between .py file and .pyc file?
>>
>
>
> Python is a byte-code compiled language, like Java many years ago.
> Normally to compile a python module, you just import it from within Python.
>
> That is not very convenient for scripts, so from the shell (bash,
> command.com, cmd.exe, or similar) you can run
>
> python -m compileall NAME NAME ...
>
> to compile scripts.
>
>
> You do not necessarily need to set the PYTHONPATH, but you can if you need
> to.
>
> .py files are source code. .pyc are compiled byte code. .pyo are compiled
> byte code with optimization turned on. Don't get too excited, the standard
> Python optimization doesn't do very much.
>
>
>
> --
> Steven
>
> __**_
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/**mailman/listinfo/tutor
>



-- 




Keep Smiling.
Regards
Gayu
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help!

[Kwpolska]

On Mon, Jan 28, 2013 at 10:22 PM, Ghadir Ghasemi
 wrote:
> Hi guys I wanted to make a program called Binary/decimal converter.

That’s easy, int('11', 2) and bin(3) should be enough.

> But I want to do it the hard way e.g. not using built in python functions. 
> Can you give me an idea about how I can do that?

Are you crazy or is it an assignment?  Write code according to this:
http://en.wikipedia.org/wiki/Binary_number#Conversion_to_and_from_other_numeral_systems
(or other methods you can find on the Internet or in math textbooks).
Alternatively, you can find out how it is done in other programming
languages or even Python itself.  And use that.

PS. actually, it is impossible to do it in plain Python without using
built-in functions.  Because multiplication, division and
exponentiation and whatnot are built-ins.

OP, please tell your mail provider that it shouldn’t filter
swearwords, and even if it does, that it shouldn’t inform me of that.

-- 
Kwpolska  | GPG KEY: 5EAAEA16
stop html mail| always bottom-post
http://asciiribbon.org| http://caliburn.nl/topposting.html
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help!

[Joel Goldstick]

On Mon, Jan 28, 2013 at 4:51 PM, Danny Yoo  wrote:

> > Hi guys I wanted to make a program called Binary/decimal converter. But
> I want to do it the hard way e.g. not using built in python functions. Can
> you give me an idea about how I can do that?
>
>
> See if you can write the steps to do this by hand.  You take binary
number -- say 10110 and convert it to decimal.  If you can do that with pad
and pencil, you are off to a good start.  If you can't, then you have to
learn that first.  Its not magic.  Learning about bit shifting will help



> Do you have an idea of what kind of things would be useful test cases
> for this converter?  Thinking about this may help solidify what it is
> you're trying to do.  By it, we want to help you express concretely
> what you mean when you say "binary/decimal converter".
>
> ---
>
> For example, if I wanted to write a program to convert "snow" to
> "water", I might start like this:
>
> I want to write a program to take words like "snow" and rewrite them
> to "water".  But anything else should stay the same.  Let me give a
> name to this.  Call it "melt".  Here are some examples I'd like to
> make work (or not work).
>
> melt("The snow is cold!")  ==> "The water is cold!"
> melt("The snowflakes are falling") ==>  "The snowflakes are falling"
> melt("Snow and ice") ==>  "Water and ice"
>
> That is, I want to make sure the translation is case sensitive, but
> only applies when the whole word "snow" shows up.
>
>
> ... etc.  A potential approach might use regular expression
> replacement, with a little bit of care about using a function for the
> replacement argument so we can handle the weird uppercasing
> requirement...
>
> ---
>
>
> If you plan like this, and include concrete test cases, then you'll
> have a better shot at solving the problem.
> ___
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>



-- 
Joel Goldstick
http://joelgoldstick.com
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help!

[Danny Yoo]

> Hi guys I wanted to make a program called Binary/decimal converter. But I 
> want to do it the hard way e.g. not using built in python functions. Can you 
> give me an idea about how I can do that?


Do you have an idea of what kind of things would be useful test cases
for this converter?  Thinking about this may help solidify what it is
you're trying to do.  By it, we want to help you express concretely
what you mean when you say "binary/decimal converter".

---

For example, if I wanted to write a program to convert "snow" to
"water", I might start like this:

I want to write a program to take words like "snow" and rewrite them
to "water".  But anything else should stay the same.  Let me give a
name to this.  Call it "melt".  Here are some examples I'd like to
make work (or not work).

melt("The snow is cold!")  ==> "The water is cold!"
melt("The snowflakes are falling") ==>  "The snowflakes are falling"
melt("Snow and ice") ==>  "Water and ice"

That is, I want to make sure the translation is case sensitive, but
only applies when the whole word "snow" shows up.


... etc.  A potential approach might use regular expression
replacement, with a little bit of care about using a function for the
replacement argument so we can handle the weird uppercasing
requirement...

---


If you plan like this, and include concrete test cases, then you'll
have a better shot at solving the problem.
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help!

[Mark K. Zanfardino]

Ghadir,

I did a quick google search for how to convert digital to binary. The 
first link was to 
http://www.ehow.com/how_5164721_convert-digital-binary.html which gives 
a pretty clear example of the process for converting digital to binary.  
Of course, you will need to translate this psuedo-code into an algorithm 
using Python.


Cheers!
Mark K. Zanfardino

On 01/28/2013 01:22 PM, Ghadir Ghasemi wrote:

Hi guys I wanted to make a program called Binary/decimal converter. But I want 
to do it the hard way e.g. not using built in python functions. Can you give me 
an idea about how I can do that?
Thank you.
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor


___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[Steven D'Aprano]

On 28/01/13 18:26, Gayathri S wrote:

Hi all..!
wanna know how to compile python script in python command line,
and is there any need for setting path for python like JAVA? whats the
difference between .py file and .pyc file?



Python is a byte-code compiled language, like Java many years ago. Normally to 
compile a python module, you just import it from within Python.

That is not very convenient for scripts, so from the shell (bash, command.com, 
cmd.exe, or similar) you can run

python -m compileall NAME NAME ...

to compile scripts.


You do not necessarily need to set the PYTHONPATH, but you can if you need to.

.py files are source code. .pyc are compiled byte code. .pyo are compiled byte 
code with optimization turned on. Don't get too excited, the standard Python 
optimization doesn't do very much.



--
Steven
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[Gayathri S]

Hi all..!
   wanna know how to compile python script in python command line,
and is there any need for setting path for python like JAVA? whats the
difference between .py file and .pyc file?
Thanks...!

On Sat, Jan 19, 2013 at 8:54 AM, bob gailer  wrote:

> On 1/18/2013 8:03 AM, eryksun wrote:
>
>> Yes, it's a mistake in the PCA example from the docs:
>>
>> http://mlpy.sourceforge.net/**docs/3.5/dim_red.html#**
>> principal-component-analysis-**pca
>>
> There seems to be no way to report a bug in that documentation! Or am I
> missing something?
>
> --
> Bob Gailer
> 919-636-4239
> Chapel Hill NC
>
>
> __**_
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/**mailman/listinfo/tutor
>



-- 




Keep Smiling.
Regards
Gayu
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help!

[Russel Winder]

Following up on Jos Kerc's answer:
 
On Fri, 2013-01-18 at 07:56 -0500, Carpenter, Steven wrote:
[…]
> print(math.acos(((a**2)+(b**2)-(c**2))/(2(a*b

2(a*b) → 2 * (a * b)

> TypeError: 'int' object is not callable

Juxtaposition does not imply multiplication in Python as it does in
mathematics.
-- 
Russel.
=
Dr Russel Winder  t: +44 20 7585 2200   voip: sip:russel.win...@ekiga.net
41 Buckmaster Roadm: +44 7770 465 077   xmpp: rus...@winder.org.uk
London SW11 1EN, UK   w: www.russel.org.uk  skype: russel_winder


signature.asc
Description: This is a digitally signed message part
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] Help!

[Jos Kerc]

You are missing a multiplication sign.

Near the end of your formula.


On Fri, Jan 18, 2013 at 1:56 PM, Carpenter, Steven <
steven.carpen...@oakland.k12.mi.us> wrote:

> To Whom it May Concern,
>
> I’m trying to get this code working. *Here’s my question:*
>
> Consider a triangle with sides of length 3, 7, and 9. The law of cosines
> states that given three sides of a triangle (a, b, and c) and angle C
> between sides a and b: Write Python code to calculate the three angles in
> the triangle.
>
> *Here’s my code: *
>
> # Calculate the angles in a triangle
>
> # Imports the Math data
>
> import math
>
> # Sets up the different angles with corresponding letters
>
> # The first angle is a
>
> a = 3
>
> # The second angle is b
>
> b = 7
>
> # The third angle is c
>
> c = 9
>
> # Calculates angle "C"
>
> print(math.acos(((a**2)+(b**2)-(c**2))/(2(a*b
>
> *Here’s my output:*
>
> Traceback (most recent call last):
>
>   File "E:\Programming\Problem4.py", line 12, in 
>
> print(math.acos(((a**2)+(b**2)-(c**2))/(2(a*b
>
> TypeError: 'int' object is not callable
>
> ** **
>
> *Steven Carpenter*
>
> ___
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>
>
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[bob gailer]

On 1/18/2013 8:03 AM, eryksun wrote:

Yes, it's a mistake in the PCA example from the docs:

http://mlpy.sourceforge.net/docs/3.5/dim_red.html#principal-component-analysis-pca
There seems to be no way to report a bug in that documentation! Or am I 
missing something?


--
Bob Gailer
919-636-4239
Chapel Hill NC

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[eryksun]

On Fri, Jan 18, 2013 at 3:25 AM, Lie Ryan  wrote:
> On 18/01/13 17:11, Gayathri S wrote:
>>
>>  >>> import numpy as np
>>  >>> import matplotlib.pyplot as plt
>>  >>> import mlpy
>>  >>> np.random.seed(0)
>>  >>> mean,cov,n=[0,0],[[1,1],[1,1.5]],100
>>  >>> x=np.random.multivariate_normal(mean,cov,n)
>>  >>> pca.learn(x)
>> Traceback (most recent call last):
>>File "", line 1, in 
>> NameError: name 'pca' is not defined
>
> As in your particular problem, the basic issue is that you have not defined
> 'pca' to refer to any object. You need to create an object named pca, which
> in this particular case the object is probably an instance of mlpy.PCA,
> which can be constructed like this:
>
> pca = mlpy.PCA()

Yes, it's a mistake in the PCA example from the docs:

http://mlpy.sourceforge.net/docs/3.5/dim_red.html#principal-component-analysis-pca
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[Lie Ryan]

On 18/01/13 17:11, Gayathri S wrote:

hi...
   I am using principal component analysis for dimensionality
reduction in python. am having this following error...
 >>> import numpy as np
 >>> import matplotlib.pyplot as plt
 >>> import mlpy
 >>> np.random.seed(0)
 >>> mean,cov,n=[0,0],[[1,1],[1,1.5]],100
 >>> x=np.random.multivariate_normal(mean,cov,n)
 >>> pca.learn(x)
Traceback (most recent call last):
   File "", line 1, in 
NameError: name 'pca' is not defined
 >>>
would you please help me in finding the error...? what was my fault? how
could i use PCA in python..?


You might want to start with a more basic tutorials for working with 
python, for example the official tutorial at 
http://docs.python.org/2/tutorial/ You should go through at least the 
first 5-6 chapters, which should take no more than several hours to skim 
through if you already have experience in any other languages.


As in your particular problem, the basic issue is that you have not 
defined 'pca' to refer to any object. You need to create an object named 
pca, which in this particular case the object is probably an instance of 
mlpy.PCA, which can be constructed like this:


pca = mlpy.PCA()



___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[Marc Tompkins]

On Thu, Jan 17, 2013 at 10:11 PM, Gayathri S wrote:

> >>> import numpy as np
> >>> import matplotlib.pyplot as plt
> >>> import mlpy
> >>> np.random.seed(0)
> >>> mean,cov,n=[0,0],[[1,1],[1,1.5]],100
> >>> x=np.random.multivariate_normal(mean,cov,n)
> >>> pca.learn(x)
> Traceback (most recent call last):
>   File "", line 1, in 
> NameError: name 'pca' is not defined
> >>>
> would you please help me in finding the error...? what was my fault? how
> could i use PCA in python..?
>
> The error means exactly what it says: you've referred to "pca", but you
haven't told Python what "pca" is.

I don't know the actual name of the PCA module you're using, but you need
to import it the same way you've imported the other packages:
-  if it's called simply "pca", then just write "import pca"
-  if it has some other, slightly longer name, and you want to shorten it
(as you did with "numpy", shortening it to "np"), then: "import longPCAname
as pca"
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[Gayathri S]

hi...
  I am using principal component analysis for dimensionality
reduction in python. am having this following error...
>>> import numpy as np
>>> import matplotlib.pyplot as plt
>>> import mlpy
>>> np.random.seed(0)
>>> mean,cov,n=[0,0],[[1,1],[1,1.5]],100
>>> x=np.random.multivariate_normal(mean,cov,n)
>>> pca.learn(x)
Traceback (most recent call last):
  File "", line 1, in 
NameError: name 'pca' is not defined
>>>
would you please help me in finding the error...? what was my fault? how
could i use PCA in python..?

  Thanks.!

On Wed, Jan 9, 2013 at 12:58 PM, Gayathri S  wrote:

> Hi..
> I would like to use Principal component analysis independent
> component analysis in python. Wanna know whether it will support this
> efficiently or not?
>
>
> On Wed, Jan 2, 2013 at 4:59 PM, Alan Gauld wrote:
>
>> On 02/01/13 07:20, Gayathri S wrote:
>>
>>> Hi..
>>>   I am using python 2.7 and scikit-learn for machine learning.
>>> And OS is Windows 7. Wanna know how to import our own data sets  in
>>> scikit-learn?
>>>
>>
>> Further to my last mail there is a gmane group
>>
>> gmane.comp.python.scikit-learn
>>
>> I'd try looking there, or wherever it is sourced originally.
>>
>>
>>
>> --
>> Alan G
>> Author of the Learn to Program web site
>> http://www.alan-g.me.uk/
>>
>> __**_
>> Tutor maillist  -  Tutor@python.org
>> To unsubscribe or change subscription options:
>> http://mail.python.org/**mailman/listinfo/tutor
>>
>
>
>
> --
>
>
>
>
> Keep Smiling.
> Regards
> Gayu
>



-- 




Keep Smiling.
Regards
Gayu
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help for a beginner

[Graham Dubow]

Murail,

Check out Udacity.com and the CS101 course. Great video lectures reinforced
by "homework" and problems (with answers) that you can do yourself. Also
has a very good forum and active user base to ask questions.

It is a good starting point for a beginner and teaches the basics behind
how to build a simple web crawler using Python.




Cheers,


Graham

On Fri, Jan 11, 2013 at 1:58 PM, MDB  wrote:

> Hi,
> I am a beginner to progrmming and want to learn basic python. I am a
> scientist (with less math background) with absolutely no programming
> experience. Are there any web based tutorials/videos/books to learn python.
>
> Any help is deeply appreciated,
> thanks
> Murail
> --
> Murali Dharan Bashyam, PhD, MNAScI
> Staff Scientist and Chief,
> Laboratory of Molecular Oncology,
> Centre for DNA Fingerprinting and Diagnostics (CDFD),
> Tuljaguda complex, Nampally,
> Hyderabad 51, INDIA
> Ph: 91-40-24749383
> Fax: 91-40-24749448
>
> ___
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>
>
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help for a beginner

[vishwajeet singh]

On Sat, Jan 12, 2013 at 12:28 AM, MDB  wrote:

> Hi,
> I am a beginner to progrmming and want to learn basic python. I am a
> scientist (with less math background) with absolutely no programming
> experience. Are there any web based tutorials/videos/books to learn python.
>

The best book for beginners in my experience is Python for Absolute
Beginners, I liked it's approach in making learning a bit fun.
A good online resource is http://www.alan-g.me.uk/


> Any help is deeply appreciated,
> thanks
> Murail
> --
> Murali Dharan Bashyam, PhD, MNAScI
> Staff Scientist and Chief,
> Laboratory of Molecular Oncology,
> Centre for DNA Fingerprinting and Diagnostics (CDFD),
> Tuljaguda complex, Nampally,
> Hyderabad 51, INDIA
> Ph: 91-40-24749383
> Fax: 91-40-24749448
>
> ___
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/mailman/listinfo/tutor
>
>


-- 
Vishwajeet Singh
+91-9657702154 | dextrou...@gmail.com | http://bootstraptoday.com
Twitter: http://twitter.com/vishwajeets | LinkedIn:
http://www.linkedin.com/in/singhvishwajeet
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[Gayathri S]

Hi..
I would like to use Principal component analysis independent
component analysis in python. Wanna know whether it will support this
efficiently or not?

On Wed, Jan 2, 2013 at 4:59 PM, Alan Gauld wrote:

> On 02/01/13 07:20, Gayathri S wrote:
>
>> Hi..
>>   I am using python 2.7 and scikit-learn for machine learning.
>> And OS is Windows 7. Wanna know how to import our own data sets  in
>> scikit-learn?
>>
>
> Further to my last mail there is a gmane group
>
> gmane.comp.python.scikit-learn
>
> I'd try looking there, or wherever it is sourced originally.
>
>
>
> --
> Alan G
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
>
> __**_
> Tutor maillist  -  Tutor@python.org
> To unsubscribe or change subscription options:
> http://mail.python.org/**mailman/listinfo/tutor
>



-- 




Keep Smiling.
Regards
Gayu
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help about to how many times the function called

[bob gailer]

On 1/4/2013 4:25 AM, Steven D'Aprano wrote:

On 04/01/13 20:17, lei yang wrote:

Hi experts

I have a function will print PASS status



def print_pass(t_elapsed):
 """
 Print PASS to stdout with PASS (green) color.
 """
 print_stdout(bcolors.PASS + "PASS" + bcolors.ENDC + " (%.2f s)" 
% t_elapsed)


I want to calculate the pass number, so I want to get " how many times
this function called" 


It is unclear to me what you want to do with the pass number or what 
PASS means or where bcolors comes from.


If you don't need to refer to the pass number outside the function 
another way (better IMHO):


def print_pass(t_elapsed, how_many_times=0):
"""
Print PASS to stdout with PASS (green) color.
"""
how_many_times += 1
print_stdout(bcolors.PASS + "PASS" + bcolors.ENDC + " (%.2f s)" % 
t_elapsed)


I for one would appreciate a more complete explanation.

--
Bob Gailer
919-636-4239
Chapel Hill NC

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help about to how many times the function called

[Steven D'Aprano]

On 04/01/13 20:17, lei yang wrote:

Hi experts

I have a function will print PASS status



def print_pass(t_elapsed):
 """
 Print PASS to stdout with PASS (green) color.
 """
 print_stdout(bcolors.PASS + "PASS" + bcolors.ENDC + " (%.2f s)" % 
t_elapsed)

I want to calculate the pass number, so I want to get " how many times
this function called"

any help?



how_many_times = 0

def print_pass(t_elapsed):
"""
Print PASS to stdout with PASS (green) color.
"""
global how_many_times
how_many_times += 1
print_stdout(bcolors.PASS + "PASS" + bcolors.ENDC + " (%.2f s)" % t_elapsed)




--
Steven
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[Alan Gauld]

On 02/01/13 07:20, Gayathri S wrote:

Hi..
  I am using python 2.7 and scikit-learn for machine learning.
And OS is Windows 7. Wanna know how to import our own data sets  in
scikit-learn?


Further to my last mail there is a gmane group

gmane.comp.python.scikit-learn

I'd try looking there, or wherever it is sourced originally.


--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] HELP- Regarding working with python

[Alan Gauld]

On 02/01/13 07:20, Gayathri S wrote:

Hi..
  I am using python 2.7 and scikit-learn for machine learning.
And OS is Windows 7. Wanna know how to import our own data sets  in
scikit-learn?



Hi,

This list is for learning Python and its standard library.

Your question looks to be specific to scikit-learn so will likely get 
more success asking on a scikit-learn forum or by contacting the author 
of scikit-learn.


If you are very lucky some of the folks on this list might just happen 
to have scikit-learn experience, but it isn't guaranteed.


--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help

[Mike G]

Hi Randy

> I am an older newbie teaching myself Python programming.
>

Me too :)

> My problem is I hear no system bell; the enter doesn't respond by quitting 
> the program;
> The problem with the program code the enter key hasn't worked in earlier 
> programs.
>
> I appreciate any advice I may recieve with this coding glitch.
>

I copied the code into a blank .py file and ran it from cmd in Windows
XP x86 using Python 273, it worked fine - including the beep. As well,
hitting "Enter" exited the program.

It sounds like (no pun intended) it may be how you're running the
program. I would use a py file and run it using cmd - holler if you
need help, you may if the path to Python isn't good to go.

Mike
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] help

[Kwpolska]

On Fri, Dec 28, 2012 at 1:30 PM, Evans Anyokwu  wrote:
> I just tried your code and it worked for me. Like Alan and Steven have
> pointed out already, sounding the system bell depends on how you are running
> the code and your platform.
>
> On my computer I have Putty installed which I use to connect remotely to my
> server - so running that script remotely will not produce any sound.

WRONG!  print '\a' sends ASCII 0x07 to the terminal, which then is
handled by the terminal the way you (or the developer) told it to
handle it.  Now, you have set PuTTY to ignore bells (or, more likely,
did not bother to change the setting and got the default).  This is
why you did not hear it.

>>> print 'sp\am'
sp[beep!]m [= 73 70 07 6D]
>>>

> However, it worked when saved and run locally on my Windows computer.

Because cmd (or whatever else you used) is set to make sound with the bell.

-- 
Kwpolska 
stop html mail  | always bottom-post
www.asciiribbon.org | www.netmeister.org/news/learn2quote.html
GPG KEY: 5EAAEA16
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor