Re: [Tutor] help regarding game code
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 regarding game code
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
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 on python
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 on python
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
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 required
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 required
On 20 March 2013 06:12, Arijit Ukil arijit.u...@tcs.com 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
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 with iterators
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
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 msire...@lightbird.net
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',
'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
--
Message: 2
Re: [Tutor] HELP: Creating animation from multiple plots
Hi Sayan, On Wed, Mar 27, 2013 at 4:14 PM, Sayan Chatterjee sayanchatter...@gmail.com 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: Creating animation from multiple plots
On Wed, Mar 27, 2013 at 4:23 PM, Amit Saha amitsaha...@gmail.com wrote: Hi Sayan, On Wed, Mar 27, 2013 at 4:14 PM, Sayan Chatterjee sayanchatter...@gmail.com 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
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 amitsaha...@gmail.com wrote: On Wed, Mar 27, 2013 at 4:23 PM, Amit Saha amitsaha...@gmail.com wrote: Hi Sayan, On Wed, Mar 27, 2013 at 4:14 PM, Sayan Chatterjee sayanchatter...@gmail.com 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
On Wed, Mar 27, 2013 at 4:36 PM, Sayan Chatterjee sayanchatter...@gmail.com 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
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 amitsaha...@gmail.com wrote: On Wed, Mar 27, 2013 at 4:36 PM, Sayan Chatterjee sayanchatter...@gmail.com 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
Hi Amit,
fo = fopen('fname','r+')
fo.write(%d %d,j,counter)
Is giving the following error:
File ZA.py, line 30, in module
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 amitsaha...@gmail.com wrote:
On Wed, Mar 27, 2013 at 4:49 PM, Sayan Chatterjee
sayanchatter...@gmail.com 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 amitsaha...@gmail.com wrote:
On Wed, Mar 27, 2013 at 4:36 PM, Sayan Chatterjee
sayanchatter...@gmail.com 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
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 module
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 amitsaha...@gmail.com wrote:
On Wed, Mar 27, 2013 at 4:49 PM, Sayan Chatterjee
sayanchatter...@gmail.com 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 amitsaha...@gmail.com wrote:
On Wed, Mar 27, 2013 at 4:36 PM, Sayan Chatterjee
sayanchatter...@gmail.com 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
Hello,
On 27 March 2013 15:59, 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 module
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
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 wpr...@gmail.com wrote:
Hello,
On 27 March 2013 15:59, Sayan Chatterjee sayanchatter...@gmail.comwrote:
Hi Amit,
fo = fopen('fname','r+')
fo.write(%d %d,j,counter)
Is giving the following error:
File ZA.py, line 30, in module
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
Putting w instead of r+ probably solves the problem. The error is not
showing now.
On 27 March 2013 21:47, Sayan Chatterjee sayanchatter...@gmail.com 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 wpr...@gmail.com wrote:
Hello,
On 27 March 2013 15:59, Sayan Chatterjee sayanchatter...@gmail.comwrote:
Hi Amit,
fo = fopen('fname','r+')
fo.write(%d %d,j,counter)
Is giving the following error:
File ZA.py, line 30, in module
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
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 sayanchatter...@gmail.com 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 wpr...@gmail.com wrote:
Hello,
On 27 March 2013 15:59, 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 module
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
Oh yes, thanks. That worked. :)
On 27 March 2013 21:58, Bod Soutar bod...@googlemail.com 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 sayanchatter...@gmail.com
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 wpr...@gmail.com wrote:
Hello,
On 27 March 2013 15:59, 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 module
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
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; i10; 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 with installing and/or running PyNomo
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 module 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
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 with iterators
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
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
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 related to unicode using python
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 related to unicode using python
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 = uఏఐఒ 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
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
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
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
On Mar 20, 2013 10:49 p.m., xDog Walker thud...@gmail.com 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
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 related to unicode using python
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 = uఏఐఒ 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 with itertools.izip_longest
On 16 March 2013 21:14, Abhishek Pratap abhishek@gmail.com 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]
[listiterator object at 0x166c990]
[it] * 2
[listiterator object at 0x166c990, listiterator object at 0x166c990]
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
[listiterator object at 0x166c990, listiterator object at 0x166c990]
next(d[1])
1
next(d[0])
2
next(d[0])
3
next(d[0])
Traceback (most recent call last):
File stdin, line 1, in module
StopIteration
next(d[1])
Traceback (most recent call last):
File stdin, line 1, in module
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 stdin, line 1, in module
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 with itertools.izip_longest
On Sat, Mar 16, 2013 at 2:32 PM, Oscar Benjamin
oscar.j.benja...@gmail.com wrote:
On 16 March 2013 21:14, Abhishek Pratap abhishek@gmail.com 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]
[listiterator object at 0x166c990]
[it] * 2
[listiterator object at 0x166c990, listiterator object at 0x166c990]
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
[listiterator object at 0x166c990, listiterator object at 0x166c990]
next(d[1])
1
next(d[0])
2
next(d[0])
3
next(d[0])
Traceback (most recent call last):
File stdin, line 1, in module
StopIteration
next(d[1])
Traceback (most recent call last):
File stdin, line 1, in module
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 stdin, line 1, in module
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
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
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
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
On 13 March 2013 15:12, Joshua Wilkerson joshjwilker...@yahoo.com 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
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 stdin, 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 stdin, 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 stdin, 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:
Re: [Tutor] help with storing money variable
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 storing money variable
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 inch to cms conversion .
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 inch to cms conversion .
On Mon, Feb 11, 2013 at 9:06 AM, Pravya Reddy pravyare...@gmail.com 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 running perl script that writes to a text file
3n2 Solutions wrote: Hello, I want to automate the following manual process from DOS promp: c:/scripts/perlperl 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
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
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
On Wed, Feb 6, 2013 at 12:47 PM, Alan Gauld alan.ga...@btinternet.com 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- Regarding python
On 5 February 2013 05:08, eryksun eryk...@gmail.com wrote: On Mon, Feb 4, 2013 at 7:21 PM, Oscar Benjamin oscar.j.benja...@gmail.com 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 with running perl script that writes to a text file
On 05/02/13 23:44, 3n2 Solutions wrote: I want to automate the following manual process from DOS promp: c:/scripts/perlperl 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
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- Regarding python
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
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
On 4 February 2013 06:24, Gayathri S gayathri.s...@gmail.com 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
On Mon, Feb 4, 2013 at 7:21 PM, Oscar Benjamin oscar.j.benja...@gmail.com 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
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
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 jacklittl...@yahoo.com wrote: I get this error Traceback (most recent call last): File C:\Users\Jack\Desktop\python\g.py, line 56, in module 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
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 module 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-Regarding python
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!
On Mon, Jan 28, 2013 at 10:22 PM, Ghadir Ghasemi
ghasemm...@leedslearning.net 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 http://kwpolska.tk | 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- Regarding working with python
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 st...@pearwood.infowrote: 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/tutorhttp://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-Regarding python
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 python
A safer approach would be - with open(filepath, mode as filehandle: indent//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 da...@davea.name 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/tutorhttp://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
missed a parenthesis, it should look like - with open(filepath, mode) as filehandle: indent//operation with the file. On Wed, Jan 30, 2013 at 12:31 PM, spa...@gmail.com wrote: A safer approach would be - with open(filepath, mode as filehandle: indent//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 da...@davea.name 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/tutorhttp://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 working with python
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!
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!
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!
On Mon, Jan 28, 2013 at 4:51 PM, Danny Yoo d...@hashcollision.org 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- Regarding working with python
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 bgai...@gmail.com 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-**pcahttp://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/tutorhttp://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!
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 module 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!
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- Regarding working with python
On Thu, Jan 17, 2013 at 10:11 PM, Gayathri S gayathri.s...@gmail.comwrote: 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 interactive input, line 1, in module 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
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 interactive input, line 1, in module 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
On Fri, Jan 18, 2013 at 3:25 AM, Lie Ryan lie.1...@gmail.com 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 interactive input, line 1, in module 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
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
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 interactive input, line 1, in module 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 gayathri.s...@gmail.com 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 alan.ga...@btinternet.comwrote: 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/tutorhttp://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
On Sat, Jan 12, 2013 at 12:28 AM, MDB bashya...@gmail.com 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 for a beginner
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 bashya...@gmail.com 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- Regarding working with python
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 alan.ga...@btinternet.comwrote: 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/tutorhttp://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
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 about to how many times the function called
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- Regarding working with python
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- Regarding working with python
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
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
On Fri, Dec 28, 2012 at 1:30 PM, Evans Anyokwu onyx...@gmail.com 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 http://kwpolska.tk 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
Re: [Tutor] help
On Thu, Dec 27, 2012 at 12:07 PM, Randy WhiteWolf randywhitew...@ymail.comwrote: I am an older newbie teaching myself Python programming. I copied the code # Emonstrates escape sequences. This exercise is on page 22 of the Phthon Programming for the Absolute Beginner by Michael Dawson. I have copied the code verbatim below. # Sound the system bell print \a print \t\t\tFancy Credits print \t\t\t \\ \\ \\ \\ \\ \\ \\ print \t\t\t\tby print \t\t\tMichael Dawson print \t\t\t \\ \\ \\ \\ \\ \\ \\ print \nSpecial thanks goes out to: print My hair stylist. Henry \'The Great\', who never says \can\'t\. raw_input (\n\nPress the enter key to exit.) 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. Sincerely, Randy ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor 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. However, it worked when saved and run locally on my Windows computer. If on windows try this - print '\a' If it still does not work make sure that your sound card is functioning and the volume it not muted. Good luck. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] help
On 27/12/12 23:07, Randy WhiteWolf wrote: # Sound the system bell print \a That comment is misleading. \a does not necessarily sound the system bell. Whether it does or not depends on the terminal you are using. For example, under Linux I am using the Konsole terminal, and I have four settings for the terminal bell: * Off * Flash the screen * System notification * Make a sound except that the make a sound setting doesn't appear to work. Other terminals may offer other choices, or no choice at all. So chances are high that printing \a will not ring the system bell. [...] raw_input (\n\nPress the enter key to exit.) 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. The enter key thing will depend on how you are running the code. If you are running the code inside an interactive environment, such as IDLE or the default Python interactive interpreter, then the above line of code does not exit. Just because it says Press enter to exit doesn't make it exit! If it said Press enter to become King of England, you wouldn't expect that to happen would you? *wink* However, when you run a script non-interactively, the script will exit when it gets to end of the file. So if you add this line just before the end: raw_input(blah blah blah any message at all) when Python reaches this line, it will pause until you hit the Enter key, then it will reach the end of the script, then it will exit. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] help
On 27/12/12 12:07, Randy WhiteWolf wrote: Phthon Programming for the Absolute Beginner by Michael Dawson. I have copied the code verbatim below. # Sound the system bell print \a ... raw_input (\n\nPress the enter key to exit.) My problem is I hear no system bell; the enter doesn't respond by quitting the program; How are you running the code? I suspect you are using IDLE or Pythonwin or some other IDE? These generally don't obey the standard escape character conventions. And in fact not all terminals do either! If you put the code in a text file called screen.py (or whatever you prefer) and run it from the command line with C:\Windows python screens.py You might see something more like the expected result. But a lot depends on your OS and terminal software. My Linux terminal doesn't ring a bell (or flash) for example. Lesson: don't rely on terminal escape characters unless you know exactly what terminal your users will be using. -- 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 please!
On Sun, Dec 2, 2012 at 2:37 AM, Jack Little jacklittl...@yahoo.com wrote: Hi Tutor, I'm getting this error Traceback (most recent call last): File C:\Users\Jack\Desktop\python\g.py, line 45, in module path_1pt1() NameError: name 'path_1pt1' is not defined With the attached file Please get back to me Thank you ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor You need to define path_1pt1 *before* simpstart. Also, about not “free source”: (a) did you mean: open source? (b) why did you publish it here? -- Kwpolska http://kwpolska.tk 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
Re: [Tutor] Help please!
On 02/12/12 12:37, Jack Little wrote: Hi Tutor, I'm getting this error Traceback (most recent call last): File C:\Users\Jack\Desktop\python\g.py, line 45, inmodule path_1pt1() NameError: name 'path_1pt1' is not defined Names need to be defined before they are used. Code needs to be indented to be inside a function, if it is not indented then it is considered to be part of the top level code that runs immediately. So you begin a new function, simpstart: def simpstart(): global ammo global health global tech_parts global radio_parts By the way, you can consolidate those four lines to one: global ammo, health, tech_parts, radio_parts But here you lose the indentation, so Python considers the following to be top level code and executes it immediately: print You awake in a haze. A crate,a door and a radio. g1 = raw_input(Which do you choose ) Questions in English should end with a question mark, or people will consider you ignorant and illiterate. Unless you are a famous poet or artist, in which case they will fawn over how transgressive you are. if g1 == CRATE or g1 == Crate or g1 == crate: What if they type cRAtE or crATE? Much simpler to do this: if g1.lower() == create: By the way, you will find programming much, much simpler if you always use meaningful variable names. g1? What does that mean? A better name would be something like user_response, or even just response. So, skipping ahead, we come to this bit: elif g2 == NORTH or g2 == North or g2 == north: path_1pt1() Again, this is better written as if g2.lower() == 'north':. At this point, Python then tries to call the path_1pt function, but it hasn't been defined yet. So it gives you a NameError. How do you fix this? Simple: this entire block of code needs to be indented level with the global declarations at the start of simstart. (Fixing this error may very well reveal further errors. Good luck!) Another comment: #A Towel Production # APOC #--- global ammo1 global ammo2 global ammo3 global health global tech_parts global exp global radio_parts These seven global lines don't do anything. They are literally pointless. One of the mysteries to me is why Python allows global declarations outside of functions, but these lines literally do nothing at all except fool the reader (you!) into thinking that they do something. Get rid of them. ammo1=10 ammo2=0 ammo3=0 I note that you have three variables, ammo1 through ammo3, but in the simpstart function, you declare a global ammo. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Help with web.py error
On Wed, Dec 5, 2012 at 2:13 AM, Erik Martinson eman_...@yahoo.com wrote: File /usr/lib/python2.7/sqlite3/dbapi2.py, line 63, in convert_date return datetime.date(*map(int, val.split(-))) ValueError: invalid literal for int() with base 10: '21 01:47:43' 127.0.0.1:59850 - - [04/Dec/2012 22:47:35] HTTP/1.1 GET / - 500 Internal Server Error I understand the error, there is no way '21 01:47:43' can become an int. What I can not figure out is the correlation between the last two lines in the traceback. What is actually calling the last command 'datetime.date'? See the web.py SqliteDB class: https://github.com/webpy/webpy/blob/master/web/db.py#L1010 Notice it sets 'detect_types'. More here: http://docs.python.org/2/library/sqlite3.html#module-functions-and-constants http://docs.python.org/2/library/sqlite3.html#default-adapters-and-converters The issue then is the created field in your todo table is type date, but contains a timestamp. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Help with writing a program
On 03/12/12 14:59, rajesh mullings wrote: Hello, I am trying to write a program which takes two lines of input, one called a, and one called b, which are both strings, then outputs the number of times a is a substring of b. If you could give me an algorithm/pseudo code of what I should do to create this program, I would greatly appreciate that. Thank you for using your time to consider my request. Are you talking about something like this? a = ing b = \ Our ingenious plan worked, and the Laughing Prince, last seen capering madly while his Motley Monks sat gibbering, was soon vanquished, though not without some achingly painful experiences. count(b, a) = should return 5 If that is what you want, try reading the Fine Manual about string methods, and you can count on finding something to help solve this problem. https://duckduckgo.com/?q=python%20string%20methods -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Help with writing a program
On 03/12/2012 03:59, rajesh mullings wrote: Hello, I am trying to write a program which takes two lines of input, one called a, and one called b, which are both strings, then outputs the number of times a is a substring of b. If you could give me an algorithm/pseudo code of what I should do to create this program, I would greatly appreciate that. Thank you for using your time to consider my request. Start here http://docs.python.org/2/library/string.html -- 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 writing a program
The Python version, is Python 3. On Sun, Dec 2, 2012 at 10:59 PM, rajesh mullings fantasti...@gmail.comwrote: Hello, I am trying to write a program which takes two lines of input, one called a, and one called b, which are both strings, then outputs the number of times a is a substring of b. If you could give me an algorithm/pseudo code of what I should do to create this program, I would greatly appreciate that. Thank you for using your time to consider my request. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Help with writing a program
There is an equivalent page in the documentation for Python 3 as well, regarding strings. This sounds a lot like a homework problem so you are unlikely to get a lot of help. You certainly won't get exact code. What have you tried so far? Where are you getting stuck? We're not here to write code for you, this list is meant to help you learn something yourself. If you just want someone to write code for you there are plenty of sites that will do that. But if you want to figure it out I'd be happy to give you some hints if I can see that you're making some effort. One effort you could make would be to find the relevant Python 3 document discussing strings and check if it has some references to finding substrings. Let me know what you try and I'll help you if you get stuck. Thanks, -Luke On Sun, Dec 2, 2012 at 11:31 PM, fantasticrm fantasti...@gmail.com wrote: The Python version, is Python 3. On Sun, Dec 2, 2012 at 10:59 PM, rajesh mullings fantasti...@gmail.comwrote: Hello, I am trying to write a program which takes two lines of input, one called a, and one called b, which are both strings, then outputs the number of times a is a substring of b. If you could give me an algorithm/pseudo code of what I should do to create this program, I would greatly appreciate that. Thank you for using your time to consider my request. ___ 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
Traceback (most recent call last): File Match finder GUI.py, line 87, in ? app = Application(root) File \Match finder GUI.py, line 23, in __init__ self.create_widgets() File Match finder GUI.py, line 61, in create_widgets self.submit_bttn = Button(self, text = Submit, command = self.reveal) AttributeError: Application instance has no attribute 'reveal' i only know really basic tkinter, but i think the error is looking for a method called reveal(). other than your __init__() and create_widgets() methods, i only see an update() method. I think your update method should be named reveal? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] help
It's asking a lot if you want people to read your whole code to try and spot the errors. Try to run it from the console and paste what the errors are here. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
