Re: [Tutor] output sequentially
lina wrote: I have below file, I wish the output following: The first field 169 -170 sequential, and then the filed 2 from 1-29, ignore the rest 4 fields, 169CHOL O28 1612 6.966 6.060 6.429 Read the lines from the file, sort them with a proper key function, write the sorted lines to a new file: with open(source.txt) as instream: lines = sorted(instream, key=mykey) with open(dest.txt, w) as outstream: outstream.writelines(lines) Now for the mykey() function: what should it look like? You want to sort by the integer value of the first two columns, so you have to split the lines into fields and then remove the non-digits from the fields you are interested in. Here's an outline: def extract_int(field): only_digits = ... return int(only_digits) assert extract_int(169CHOL) == 169 assert extract_int(H28) == 28 def mykey(line): fields = ... # example: ['169CHOL', 'H29', '1611', '6.963', '6.155', '6.395'] return extract_int(fields[0]), extract_int(fields[1]) assert mykey(169CHOL H29 1611 6.963 6.155 6.395\n) == (169, 28) Can you fill in the blanks? ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Python Tkinter event activated with time
Hello All, I am putting together a small game, and I would want to enable my callback function using time passed. How to do something like this with Tkinter event. from time import time ftime = time() if ftime - time() 2000: dosomething -- *Satajanus Nig. Ltd * ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Python Tkinter event activated with time
Emeka wrote: I am putting together a small game, and I would want to enable my callback function using time passed. How to do something like this with Tkinter event. from time import time ftime = time() if ftime - time() 2000: dosomething You can schedule a function call with the after() method: import Tkinter as tk def scroll(s): while True: yield s s = s[-1] + s[:-1] hello = scroll(Hello world! *** ) def do_something(): label[text] = next(hello) # play it again, after 100 msecs label.after(100, do_something) root = tk.Tk() label = tk.Label(root, font=(Times, 36)) label.pack() do_something() root.mainloop() ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Object Management
Hello everyone. I'm having trouble wrapping my mind around a project I'm working on. My goal is to create a program that manages (allows its users to manipulate, search by criteria and edit) objects. There is one type of object, for example I'll say it's a car. There will be a central data file containing all of the cars and multiple users will have access to it at once. I'm having trouble here, I've done some research on MOO and twisted but I'm not sure where to turn. Additionally I'll need a GUI! tkinter? Does anyone have any suggestions on how to get started with tkinter? I'm overwhelmed with the amount of documentation I've had to read and think I have to read to accomplish my goal. Thanks for reading, Alex.ander -- Alexander ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Object Management
On Wed, Jul 27, 2011 at 9:51 AM, Alexander rhettna...@gmail.com wrote: Hello everyone. I'm having trouble wrapping my mind around a project I'm working on. My goal is to create a program that manages (allows its users to manipulate, search by criteria and edit) objects. There is one type of object, for example I'll say it's a car. There will be a central data file containing all of the cars and multiple users will have access to it at once. I'm having trouble here, I've done some research on MOO and twisted but I'm not sure where to turn. Additionally I'll need a GUI! tkinter? Does anyone have any suggestions on how to get started with tkinter? I'm overwhelmed with the amount of documentation I've had to read and think I have to read to accomplish my goal. Thanks for reading, Alex.ander -- Alexander ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor It sounds like your learning a lot of this as you go. Honestly, I would scrap the GUI idea and just use Django. This will solve your mulit-user, front end, and back end problems in one go. Of course, that's an entire skillset onto itself and it may not be worth the time investment. But if you already know some HTML, it would be an asset for years to come, if you picked it up. In which case, simply use SQlite as your backend (it comes with Python) and then chose a GUI toolkit from there. Designing a GUI is not for the feint of heart. Tkinter is an option, but you may want to use Wx or GTK. A third option is to use Django to manage your backend (by creating models and such) and then designing a gui on top of that. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Object Management
Am 27.07.2011 15:51, schrieb Alexander: Hello everyone. I'm having trouble wrapping my mind around a project I'm working on. My goal is to create a program that manages (allows its users to manipulate, search by criteria and edit) objects. There is one type of object, for example I'll say it's a car. There will be a central data file containing all of the cars and multiple users will have access to it at once. I'm having trouble here, I've done some research on MOO and twisted but I'm not sure where to turn. Sounds familiar ;-) ... on the way a lot of question are likely to arise. Like, OK, I've got a database. Do I load all the data at once to the client or only on request? What about concurrent usage by different clients (users)? How about authentification and authorisition? If I build a rich client (a python programm with GUI and network connection to the database), how do I manage the objects on the client? As James already hinted, there're fantastic python web frameworks. They have solutions for almost all the questions that will cross your path. There're some relgious wars about which is the best. In my opinion Django is the best for starters. Do some tutorials, read the Django book and you'll get an idea about the overall architcture, models, views, templates, etc. Additionally I'll need a GUI! tkinter? Does anyone have any suggestions on how to get started with tkinter? I'm overwhelmed with the amount of documentation I've had to read and think I have to read to accomplish my goal. I've written a rich client with PyQt which talks via web services to a web server. It's a lot of work! You have a lot of options, performance is amazing, but due to the complexity I would recommend to start with a web interface. If you really need or want a rich client, you should look into Dabo: http://dabodev.com/about There's also another rich application framework which uses PyQt and looks very good, but I forgot the name. I'm not sure about wether this is free or commercial. Thanks for reading, Alex.ander -- Alexander ___ 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
[Tutor] shlex parsing
Hello All, I would like to parse this TCL command line with shlex: '-option1 [get_rule A1 B2] -option2 $VAR -option3 TAG' And I want to get the splitted list: ['-option1', '[get_rule A1 B2]', '-option2', '$VAR', '-option3', 'TAG'] Then I will gather in tuple 2 by 2 the arguments. I tried to the shlec properties attributes 'quotes', 'whitespace', etc... But I make 'choux blanc'. If somebody has complex experiences with this module I am in. Cheers Karim ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] shlex parsing
Thank you Dan for answering.
I ended with this and gave up with shlex:
split = ['-option1', '[get_rule', 'A1', 'B2]', '-option2', '$VAR',
'-option3', 'TAG']
procedure_found = False
result = []
for token in split:
if not token.startswith('[') and not token.endswith(']') and not
procedure_found:
result.append(token)
elif token.startswith('['):
procedure_found = True
_token = token
elif token.endswith(']'):
procedure_found = False
_token += ' ' + token
result.append(_token)
else:
_token += ' ' + token
print split
print result
which gives the desired values:
['-option1', '[get_rule', 'A1', 'B2]', '-option2', '$VAR', '-option3',
'TAG']
['-option1', '[get_rule A1 B2]', '-option2', '$VAR', '-option3', 'TAG']
Sure pyParsing seems to be pretty simple but my constraint is to use
standard lib (at maximum). To bad it is not part of python standard libs.
On the other hand, I will have to regroup expression like '-option1 $VAL
== $CONSTRAINT'
in ['-option1', '$VAL == $CONSTRAINT'].
So it seems that I have no others choicse and have to use a parser like
pyParsing.
Regards
Karim
On 07/27/2011 10:44 PM, Dan Stromberg wrote:
I've not used the shlex module, but this feels more like an issue to
address with a parser than for a lexical analyzer - or perhaps even
both, since you're splitting on whitespace sometimes, and matching
square brackets sometimes.
I've used pyparsing for stuff a bit similar to this.
Or here's a list:
http://wiki.python.org/moin/LanguageParsing
On Wed, Jul 27, 2011 at 12:30 PM, Karim karim.liat...@free.fr
mailto:karim.liat...@free.fr wrote:
Hello All,
I would like to parse this TCL command line with shlex:
'-option1 [get_rule A1 B2] -option2 $VAR -option3 TAG'
And I want to get the splitted list:
['-option1', '[get_rule A1 B2]', '-option2', '$VAR', '-option3',
'TAG']
Then I will gather in tuple 2 by 2 the arguments.
I tried to the shlec properties attributes 'quotes', 'whitespace',
etc...
But I make 'choux blanc'.
If somebody has complex experiences with this module I am in.
Cheers
Karim
--
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[Tutor] Getting Idle to work in Win7
It's been many months since I played with Python, and have forgotten how to bring up IDLE. If I simply click on a py file, I see what may be a dos window appear and quickly disappear. If I right-click on the file, and select IDLE, the same thing happens. If I go directly to All Programs, the same thing happens when I select IDLE. -- Wayne Watson (Watson Adventures, Prop., Nevada City, CA) (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time) Obz Site: 39° 15' 7 N, 121° 2' 32 W, 2700 feet The physicist uses ordinary words in a peculiar manner. -- Richard Feynma in The Character of Physical Law Web Page:www.speckledwithstars.net/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Getting Idle to work in Win7
Hi On 27 July 2011 22:07, Wayne Watson sierra_mtnv...@sbcglobal.net wrote: It's been many months since I played with Python, and have forgotten how to bring up IDLE. If I simply click on a py file, I see what may be a dos window appear and quickly disappear. If I right-click on the file, and select IDLE, the same thing happens. If I go directly to All Programs, the same thing happens when I select IDLE. There must be something wrong with your Python installation. Right-click-Edit with Idle and starting IDLE from All Programs works fine for me. (Win 7 64-bit, with both Python 2.7 and 3.2 installed.) I suggest you reinstall Python as a start. It might also be worthwhile to try to run your Python script from the command line, as well as starting Idle from the command line so you can see what error message might be printed. Cheers Walter ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Fall in love with bpython
Hello, I use bpython interpreter. This is a very good interactive CLI. I want to create a CLI with the same features than bpython. But the cmd std module seems no to be used in this project... Is there a tool where I can plug all my grammary commands line a sort of generic box with completion, highlights, etc... Cheers Karim ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] shlex parsing
On 07/28/2011 12:11 AM, Dan Stromberg wrote:
You could probably use a recursive descent parser with the standard
library.
But if your management is OK with pyparsing, that might be easier, and
a bit more clear as well.
Yes, I thought to use str method partition in a recursive way but using
pyParsing still be easer.
Thanks
Cheers
On Wed, Jul 27, 2011 at 2:08 PM, Karim karim.liat...@free.fr
mailto:karim.liat...@free.fr wrote:
Thank you Dan for answering.
I ended with this and gave up with shlex:
split = ['-option1', '[get_rule', 'A1', 'B2]', '-option2', '$VAR',
'-option3', 'TAG']
procedure_found = False
result = []
for token in split:
if not token.startswith('[') and not token.endswith(']') and
not procedure_found:
result.append(token)
elif token.startswith('['):
procedure_found = True
_token = token
elif token.endswith(']'):
procedure_found = False
_token += ' ' + token
result.append(_token)
else:
_token += ' ' + token
print split
print result
which gives the desired values:
['-option1', '[get_rule', 'A1', 'B2]', '-option2', '$VAR',
'-option3', 'TAG']
['-option1', '[get_rule A1 B2]', '-option2', '$VAR', '-option3',
'TAG']
Sure pyParsing seems to be pretty simple but my constraint is to use
standard lib (at maximum). To bad it is not part of python
standard libs.
On the other hand, I will have to regroup expression like
'-option1 $VAL == $CONSTRAINT'
in ['-option1', '$VAL == $CONSTRAINT'].
So it seems that I have no others choicse and have to use a parser
like pyParsing.
Regards
Karim
On 07/27/2011 10:44 PM, Dan Stromberg wrote:
I've not used the shlex module, but this feels more like an issue
to address with a parser than for a lexical analyzer - or perhaps
even both, since you're splitting on whitespace sometimes, and
matching square brackets sometimes.
I've used pyparsing for stuff a bit similar to this.
Or here's a list:
http://wiki.python.org/moin/LanguageParsing
On Wed, Jul 27, 2011 at 12:30 PM, Karim karim.liat...@free.fr
mailto:karim.liat...@free.fr wrote:
Hello All,
I would like to parse this TCL command line with shlex:
'-option1 [get_rule A1 B2] -option2 $VAR -option3 TAG'
And I want to get the splitted list:
['-option1', '[get_rule A1 B2]', '-option2', '$VAR',
'-option3', 'TAG']
Then I will gather in tuple 2 by 2 the arguments.
I tried to the shlec properties attributes 'quotes',
'whitespace', etc...
But I make 'choux blanc'.
If somebody has complex experiences with this module I am in.
Cheers
Karim
--
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___
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Re: [Tutor] Object Management
Alexander wrote: Hello everyone. I'm having trouble wrapping my mind around a project I'm working on. My goal is to create a program that manages (allows its users to manipulate, search by criteria and edit) objects. There is one type of object, for example I'll say it's a car. There will be a central data file containing all of the cars and multiple users will have access to it at once. I'm having trouble here, I've done some research on MOO and twisted but I'm not sure where to turn. I'd forget twisted etc for this, it sounds more like a traditional database is whats needed. Additionally I'll need a GUI! tkinter? Does anyone have any suggestions on how to get started with tkinter? I'm overwhelmed with the amount of documentation I've had to read and think I have to read to accomplish my goal. Learning any GUI is a painful leaning curve. If you really need a desktop client rather than a web based solution I'd look at Dabo. It has a GUI builder (based on wxPython rather than Tkinter) and is focused on data oriented applications. But if you can go down the web root then most python web frameworks will provide both the UI and database elements for you and you get a lot of standard functionality (login etc) for free... HTH, Alan G. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Fall in love with bpython
Karim wrote: I use bpython interpreter. This is a very good interactive CLI. I had never heard of it and had to google for it. It appears to be a curses based CLI for *nix and MacOS I want to create a CLI with the same features than bpython. But the cmd std module seems no to be used in this project... Why not read the bpython source to see what they used? Thats the big advantage of open source - its open! (Although they don't make the source explicitly available, I'm assuming the tar file contains the source- it might even be in Python!) They use pygments to parse the source as you type. That would be worth investigating too... HTH, Alan G. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Object Management
On Tue, Jul 26, 2011 at 6:25 PM, Alan Gauld alan.ga...@btinternet.comwrote: Alexander wrote: Hello everyone. I'm having trouble wrapping my mind around a project I'm working on. My goal is to create a program that manages (allows its users to manipulate, search by criteria and edit) objects. There is one type of object, for example I'll say it's a car. There will be a central data file containing all of the cars and multiple users will have access to it at once. I'm having trouble here, I've done some research on MOO and twisted but I'm not sure where to turn. I'd forget twisted etc for this, it sounds more like a traditional database is whats needed. Additionally I'll need a GUI! tkinter? Does anyone have any suggestions on how to get started with tkinter? I'm overwhelmed with the amount of documentation I've had to read and think I have to read to accomplish my goal. Learning any GUI is a painful leaning curve. If you really need a desktop client rather than a web based solution I'd look at Dabo. It has a GUI builder (based on wxPython rather than Tkinter) and is focused on data oriented applications. But if you can go down the web root then most python web frameworks will provide both the UI and database elements for you and you get a lot of standard functionality (login etc) for free... HTH, Alan G. -- Thanks for the replies Alan, James, and Knacktus. I'll research Django. I've been trying to work on this project for a few months and just came across the mailing list today. I appreciate your help, thanks! Alexander ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Getting Idle to work in Win7
From: tutor-bounces+ramit.prasad=jpmchase@python.org [mailto:tutor-bounces+ramit.prasad=jpmchase@python.org] On Behalf Of Walter Prins Sent: Wednesday, July 27, 2011 4:39 PM To: tutor@python.org Subject: Re: [Tutor] Getting Idle to work in Win7 Hi On 27 July 2011 22:07, Wayne Watson sierra_mtnv...@sbcglobal.netmailto:sierra_mtnv...@sbcglobal.net wrote: It's been many months since I played with Python, and have forgotten how to bring up IDLE. If I simply click on a py file, I see what may be a dos window appear and quickly disappear. If I right-click on the file, and select IDLE, the same thing happens. If I go directly to All Programs, the same thing happens when I select IDLE. There must be something wrong with your Python installation. Right-click-Edit with Idle and starting IDLE from All Programs works fine for me. (Win 7 64-bit, with both Python 2.7 and 3.2 installed.) I suggest you reinstall Python as a start. It might also be worthwhile to try to run your Python script from the command line, as well as starting Idle from the command line so you can see what error message might be printed. Cheers Walter Open cmd.exe and then navigate to the directory where Python is installed (C:\Python27) for me and then cd into the Lib\idlelib directory and run idle.bat. Hopefully there should be some errors that show in the window. If not you can try running it ..\..\pythonw.exe idle.pyw and hopefully that will show the problem. Ramit Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology 712 Main Street | Houston, TX 77002 work phone: 713 - 216 - 5423 This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to European legal entities.___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Fall in love with bpython
On 07/27/2011 12:34 AM, Alan Gauld wrote: Karim wrote: I use bpython interpreter. This is a very good interactive CLI. I had never heard of it and had to google for it. It appears to be a curses based CLI for *nix and MacOS Ah Windows user. I want to create a CLI with the same features than bpython. But the cmd std module seems no to be used in this project... Why not read the bpython source to see what they used? Thats the big advantage of open source - its open! (Although they don't make the source explicitly available, I'm assuming the tar file contains the source- it might even be in Python!) They use pygments to parse the source as you type. That would be worth investigating too... Yes I saw mainly pygments which is an OpenSource project... But, I must admit. I will spend 6 months before understanding this. Rhahaaa... This level is high! I saw too cmd2 which is fully compatible and inherit from cmd. But not quite as fun! The main module cli.py is 1700 lignes and the architecture is not very well documented. We will see If I can make any progress during the next month. Thanks Alan PS: Are you still making some hiking in the higlands. Beautiful photos I have seen on your web site! Cheers Alan HTH, Alan G. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Fall in love with bpython
On 07/28/2011 12:31 AM, Michael Poeltl wrote: hi, have you heard abut ipython? maybe that's helpful for you? http://ipython.scipy.org/moin/python Hello Michael, Yes I saw some article where Ipython and Bpython CLI integrations was made in Django. Thanks for the link I will evaluate it as well. Cheers Karim Michael * Karimkarim.liat...@free.fr [2011-07-27 23:46]: Hello, I use bpython interpreter. This is a very good interactive CLI. I want to create a CLI with the same features than bpython. But the cmd std module seems no to be used in this project... Is there a tool where I can plug all my grammary commands line a sort of generic box with completion, highlights, etc... Cheers Karim -- http://mail.python.org/mailman/listinfo/python-list ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Fall in love with bpython
Hi Karim On 28 July 2011 00:04, Karim karim.liat...@free.fr wrote: On 07/27/2011 12:34 AM, Alan Gauld wrote: Karim wrote: I use bpython interpreter. This is a very good interactive CLI. I had never heard of it and had to google for it. It appears to be a curses based CLI for *nix and MacOS Ah Windows user. Thanks for mentioning bpython -- I had also not heard of it but it duly installed on my ubuntu box from the repositories! I've browsed the code -- it uses ncurses to do the screen IO. You can always read the code, but, as you intimated, unless you're pretty familiar with somewhat large codebases and ncurses it might not be that much use to you just yet. ... Still, it might be worth having a look at the source... :) http://hg.bpython-interpreter.org/bpython/src/bcd836c859aa/bpython/ Walter ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Fall in love with bpython
On 07/28/2011 01:32 AM, Walter Prins wrote: Hi Karim On 28 July 2011 00:04, Karim karim.liat...@free.fr mailto:karim.liat...@free.fr wrote: On 07/27/2011 12:34 AM, Alan Gauld wrote: Karim wrote: I use bpython interpreter. This is a very good interactive CLI. I had never heard of it and had to google for it. It appears to be a curses based CLI for *nix and MacOS Ah Windows user. Thanks for mentioning bpython -- I had also not heard of it but it duly installed on my ubuntu box from the repositories! I've browsed the code -- it uses ncurses to do the screen IO. You can always read the code, but, as you intimated, unless you're pretty familiar with somewhat large codebases and ncurses it might not be that much use to you just yet. ... Still, it might be worth having a look at the source... :) http://hg.bpython-interpreter.org/bpython/src/bcd836c859aa/bpython/ Walter Hi, I am using ubuntu too. I used to write large API but in fact I did not know curses and I wanted to see in the code where the keywords are 'injected' to try with my own grammar. I still have to study the details. But it seems that the keywords are imported dynamically from __builtins__ module. Don't know yet how to configure or modify it. Thanks for your advice Regards Karim ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Object Management
Alexander wrote: Hello everyone. I'm having trouble wrapping my mind around a project I'm working on. My goal is to create a program that manages (allows its users to manipulate, search by criteria and edit) objects. There is one type of object, for example I'll say it's a car. This is called a database. Implementing databases correctly is a HUGE job: more work than writing an operating system. Take my advice and choose an existing database. If your needs are light, use SQLite. If your needs are heavy, MySQL or Postgres. If you need to impress corporate buyers with more money than sense, and you have a large budget, Oracle. Then concentrate on building the user-friendly front-end to the database. That alone will be a big job. If you are happy with a web-interface, rather than a desktop GUI, I recommend you look at CherryPy. It's a nice, lightweight web framework without the learning curve of Django and similar. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Assigning range
Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! -Alex ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] shlex parsing
Karim wrote:
Hello All,
I would like to parse this TCL command line with shlex:
'-option1 [get_rule A1 B2] -option2 $VAR -option3 TAG'
And I want to get the splitted list:
['-option1', '[get_rule A1 B2]', '-option2', '$VAR', '-option3', 'TAG']
Then I will gather in tuple 2 by 2 the arguments.
I tried to the shlec properties attributes 'quotes', 'whitespace', etc...
I don't understand what you are doing here. Please show the code you use.
The shlex module doesn't support bracketed expressions. I recommend you
write a post-processor. Start with doing this:
import shlex
text = '-option1 [get_rule A1 B2] -option2 $VAR -option3 TAG'
shlex.split(text)
['-option1', '[get_rule', 'A1', 'B2]', '-option2', '$VAR', '-option3',
'TAG']
then take that list and reassemble the pieces starting with '[' until
']' Something like this, untested:
def reassemble(items):
result = []
bracketed = False
current = ''
for item in items:
if item.startswith('['):
bracketed = True
if bracketed:
current += item
if item.endswith(']'):
bracketed = False
result.append(current)
current = ''
else:
result.append(item)
return result
But I make 'choux blanc'.
I don't know what that means.
--
Steven
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Re: [Tutor] Assigning range
Alexander Quest wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! Forget about using range, that just adds meaningless complexity. What is important is that you have a lower bound, and a higher bound: two numbers, instead of how ever many (possible thousands, or millions!) in range(low, high). middle = (low+high)//2 -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] shlex parsing
On 07/28/2011 02:27 AM, Steven D'Aprano wrote:
Karim wrote:
Hello All,
I would like to parse this TCL command line with shlex:
'-option1 [get_rule A1 B2] -option2 $VAR -option3 TAG'
And I want to get the splitted list:
['-option1', '[get_rule A1 B2]', '-option2', '$VAR', '-option3',
'TAG']
Then I will gather in tuple 2 by 2 the arguments.
I tried to the shlec properties attributes 'quotes', 'whitespace',
etc...
I don't understand what you are doing here. Please show the code you use.
The shlex module doesn't support bracketed expressions. I recommend
you write a post-processor. Start with doing this:
import shlex
text = '-option1 [get_rule A1 B2] -option2 $VAR -option3 TAG'
shlex.split(text)
['-option1', '[get_rule', 'A1', 'B2]', '-option2', '$VAR', '-option3',
'TAG']
then take that list and reassemble the pieces starting with '[' until
']' Something like this, untested:
def reassemble(items):
result = []
bracketed = False
current = ''
for item in items:
if item.startswith('['):
bracketed = True
if bracketed:
current += item
if item.endswith(']'):
bracketed = False
result.append(current)
current = ''
else:
result.append(item)
return result
Yes Steven this is the kind of code I wrote in a post earlier, but I
forget to reinit as you did current equal to _token in my code, thanks
for that for showing me to simply if/elif/elif/else levels:
Previous code was:
I ended up with this and gave up with shlex:
split = ['-option1', '[get_rule', 'A1', 'B2]', '-option2', '$VAR',
'-option3', 'TAG']
procedure_found = False
result = []
for token in split:
if not token.startswith('[') and not token.endswith(']') and not
procedure_found:
result.append(token)
elif token.startswith('['):
procedure_found = True
_token = token
elif token.endswith(']'):
procedure_found = False
_token += ' ' + token
result.append(_token)
else:
_token += ' ' + token
print split
print result
But I make 'choux blanc'.
I don't know what that means.
This means 'white cabbage' in french = 'unsuccessful try'
Cheers
Karim
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Re: [Tutor] Assigning range
Thanks Steven- I'll try that out. -Alex On Wed, Jul 27, 2011 at 5:40 PM, Steven D'Aprano st...@pearwood.infowrote: Alexander Quest wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! Forget about using range, that just adds meaningless complexity. What is important is that you have a lower bound, and a higher bound: two numbers, instead of how ever many (possible thousands, or millions!) in range(low, high). middle = (low+high)//2 -- 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 ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Assigning range :p:
On Wed, 27 Jul 2011 20:16:31 -0400 Alexander Quest alexxqu...@gmail.com wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! -Alex There are probably better ways but this worked for me: x=range(1,50) mid=x[len(x)/2] You do have to keep in mind the way python counts list indices for a range call - i.e. x=range(1,50) will give you a list with all numbers 1 to 49 in it. Hope that helps! tom ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] how to temporarily disable a function
Hi I was wondering if there is a way to disable a function. Hi have a GUI grid snapping function that I use in a program called Nuke (the film compositing software) Here is the function (which loads when Nuke loads): ### def theAutoplaceSnap(): try: nuke.thisNode().autoplace() n = nuke.allNodes(); for i in n: nuke.autoplaceSnap(i) except: pass nuke.addOnUserCreate(theAutoplaceSnap) ### I have many functions which get loaded, but this particular one needs to be disabled when I am viewing another compositors script in the gui. I have a python script editor in Nuke in which I can run code if need be to run code on the fly. Help -- Pete ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Assigning range
You could start with an anonymous function using the lambda operator, such as: mid_range = lambda x: x[len(x) // 2] Note: If you use len(x) / 2 in python 3.x you will get a TypeError because the division operator / returns a float. Floor // returns an int in 2.x and 3.x. Then use either: x = range(1000, 4001) mid_x = mid_range(x) # mid_x == 2500 or… mid_x = mid_range(range(500, 751)) # mid_x == 625 etc. to retrieve the middle element. You can extract the mid point of any sequence type, such as a string, using this function. mid_x = mid_range(‘12345678987654321’) # mid_x == ‘9’ middle_number = lambda lo, hi: abs(lo - hi) // 2 will work if you just need the mid point of two numbers; either ints or floats. mid_x = middle_number(0, 1000) # mid_x = 500 DW On Jul 27, 2011, at 8:16 PM, Alexander Quest wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! -Alex ___ 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] Assigning range
Thanks for that Donald! -Alex On Wed, Jul 27, 2011 at 8:16 PM, Donald Wilson donald...@me.com wrote: You could start with an anonymous function using the lambda operator, such as: mid_range = lambda x: x[len(x) // 2] Note: If you use len(x) / 2 in python 3.x you will get a TypeError because the division operator / returns a float. Floor // returns an int in 2.x and 3.x. Then use either: x = range(1000, 4001) mid_x = mid_range(x) # mid_x == 2500 or… mid_x = mid_range(range(500, 751)) # mid_x == 625 etc. to retrieve the middle element. You can extract the mid point of any sequence type, such as a string, using this function. mid_x = mid_range(‘12345678987654321’) # mid_x == ‘9’ middle_number = lambda lo, hi: abs(lo - hi) // 2 will work if you just need the mid point of two numbers; either ints or floats. mid_x = middle_number(0, 1000) # mid_x = 500 DW On Jul 27, 2011, at 8:16 PM, Alexander Quest wrote: Does anyone know how to assign a certain numerical range to a variable, and then choose the number that is the middle of that range? For example, I want to assign the variable X a range between 1 and 50, and then I want to have the middle of that range (25) return with some command when I call it (perhaps rangemid or something like that?). In pseudocode, I am trying to say X = range [1,50], return middle of range (which should return 25) but I don't know how to code it. This is for a basic program I'm trying to write where the player thinks of a number and the computer tries to guess the number in as few tries as possible. Thanks for any help! -Alex ___ 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 ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
