🌐 Mailman 3 January 2001 - Tutor - python.org

Windons Task tray
by rhicks＠rma.edu July 4, 2001

July 4, 2001

Is it possible to minimize a python program to the task tray area of the taskbar in Windows95/98? Bob pop3.rma.edu

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where to start?
by Gary Kekich Feb. 6, 2001

Feb. 6, 2001

I'm interested in programming but I'm entirely new and would like to know the best way to start.

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Reading from a GUI
by Budgester Feb. 2, 2001

Feb. 2, 2001

Hi all, I have posted to script to Rob, http://www.lowerstandard.com/python/pythonsource.html (Martin Stevens, TKinter thingy) What I'd like to do now is read the text string that is retrieved from the text box and find the line breaks/carriage returns. Should I use readlines ? This is eventually gonna be a html diary updater so what I want to be able to do is replace the line break from the text box with a <BR>. Shouldn't be to difficult but I need to find the escape code for the line break. Any ideas would help Budgester mailto:budgester@budgester.com http://www.budgester.com

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square root
by W.W. van den Broek Feb. 2, 2001

Feb. 2, 2001

How do you use the square root as operator in python? Dumb question, but thanks anyway, walter -- W.W. van den Broek e-mail: vandenbroek(a)psyd.azr.nl AZR-Dijkzigt fax: 010-4633217 afdeling psychiatrie tel: 010-4639222 Postbus 2040 e-mail vdbroekw(a)wxs.nl (thuis) 3000 CA Rotterdam homepage: http://home.planet.nl/~vdbroekw

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Equivalent of a Subroutine in Python?
by Seelinger, Bruce Feb. 1, 2001

Feb. 1, 2001

Hello, Another question from someone totally new to Python. Is there an equivalent in Python to a sub-routine, (e.g. gosub and return). I want to create a modular program with sub-routines to perform distinct tasks wihin the program for organizational and debugging purposes, etc. Is the only (or best) way to do this is with modules? A function works but the values obtained within the function do not appear to be valid outside of that function. I guess I am looking for the best approach to create the subroutines for execution from the main flow of the program. Thanks for any assistance! Regards, Bruce Seelinger

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NEWBIE!! pipes
by AquaRock7＠aol.com Feb. 1, 2001

Feb. 1, 2001

What are pipes? The docs barely touched this subject, it assumed you already knew what they are... From context I am gathering that it is a connection to the kernel? (maybe?) How can I utilize this? 1 more quickie: >if __name__ == '__main__': > main() what is the pourpose if the above code? It runs the sub main() (duh :) but, why not just main() wihtout the if? what is the conditional testing for? and what are the variables __main__ and __name__? i dont believe they are defined in the program, so just what are they? and, what does putting "__" around a variable actually DO besides look cool ? Thank you, ~Dustin

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Word count help
by Fabrizio Feb. 1, 2001

Feb. 1, 2001

Hello, I am a newbie and I am trying to write a simple program that counts how many times each word in a text file appears in the text itself. It reads a line from file, converts it into a list, then counts it saving results to be added to those of next lines. The program returns two list: one contains the all the words that appears in the text, and the second one contains the associated frequencies of each word. See the attached script (I hope there are not mistakes, since I cut & pasted it and translated all function and variable names etc. from Italian... ). It seems to work fine, but it is very slow, and when working on large .txt files (500 Kb or more) it takes several hours (!) to finish. Is there any way to improve it and making it faster ? Thanks in advance, Fabrizio C. ----------------- class TextProcess : [......] def Wordcount (self, testo, tablett, freq): import string dic =[] for r in testo: if tablett.count(r)== 0 : tablett.append(r) k = testo.count(r) freq.append(k) dic.append(r) else : ind = tablett.index (r) if dic.count(r)== 0: k = testo.count (r) freq [ind] = freq[ind] + k dic.append(r) return tablett, freq #------------------------- class WordProcess(TextProcess): def operate (self, testo, tablett1, freq1): [....] tablett, freq = self.Wordcount(testo, tablett1, freq1) return tablett, freq #-------------------------- def ContaParole(self, event): tablett1, freq1, tablett2, freq2 =[], [], [],[] testo = open('text.txt, 'r') import string object = WordProcess() [.....] for text in testo.readlines(): par = string.split(text) tablett1, freq1 = object.operate(par, tablett2, freq2) file.close()

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os.popen: writing to
by James Lockley Feb. 1, 2001

Feb. 1, 2001

hi all am tryng to automate a process using python to control the calling. At the moment have pythin calling windows batch files using os.popen, which works fine. i now want to go to the next step and get rid of the batch files... i need to open a pipe to a command and then write the command arguments to it. as far as i could make out from the documentation, this should work: >>> abaqus='c:\\abaqus\\5.8-14\\abaqus.exe' >>> abq=os.popen(abaqus,'w') >>> abq.write('post') but i get this: Traceback (innermost last): File "<interactive input>", line 1, in ? IOError: [Errno 22] Invalid argument (this in a dos window works fine: D:\Work\Current>c:\abaqus\5.8-14\abaqus.exe post) thanks in anticipation james P.S. any idea where to find out what the error numbers corelate to ? ------------------------------------------------------------------------------- Ever stop to think and then forget to start again........? -------------------------------------------------------------------------------

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RE: [Tutor] Unpacking a Tuple - Can It Be Done with a CSV Line?
by Doug Stanfield Jan. 30, 2001

Jan. 30, 2001

What you're looking for is the string functions. There have been some changes in this area between Python 1.5.2 and 2.0. I'm most familiar with 1.5.2 so thats what I give you here: [dougs@lawehana dougs]$ python Python 1.5.2 (#1, Apr 18 1999, 16:03:16) [GCC pgcc-2.91.60 19981201 (egcs-1.1.1 on linux2 Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam >>> import string >>> line = 'value1, value2, value3, value4' >>> values = string.split(line,',') >>> print values ['value1', ' value2', ' value3', ' value4'] >>> -Doug- -----Original Message----- From: Seelinger, Bruce [mailto:bseelinger@neteffectcorp.com] Sent: Tuesday, January 30, 2001 11:50 AM To: 'tutor(a)python.org' Subject: [Tutor] Unpacking a Tuple - Can It Be Done with a CSV Line? Hello, I am writing a script which opens a file which consists of comma separated entries similar to the example below: value1, value2, value3, value4, etc. etc. The above line is read and assigned to a variable. At that point I was hoping it could be treated as a tuple or sequence of values. Unfortunately, the variable treats the entire line as a single string instead of separate values between the commas. Is there any way to have the line act as a tuple which can be unpacked? Essentially, I want to extract values from a comma separated list of values from each line. I am relatively new to Python and the only other language I have extensive programming with is VMS's DCL. Can anyone help? Thanks in advance for any help! Regards, Bruce Seelinger

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Unpacking a Tuple - Can It Be Done with a CSV Line?
by Seelinger, Bruce Jan. 30, 2001

Jan. 30, 2001

Hello, I am writing a script which opens a file which consists of comma separated entries similar to the example below: value1, value2, value3, value4, etc. etc. The above line is read and assigned to a variable. At that point I was hoping it could be treated as a tuple or sequence of values. Unfortunately, the variable treats the entire line as a single string instead of separate values between the commas. Is there any way to have the line act as a tuple which can be unpacked? Essentially, I want to extract values from a comma separated list of values from each line. I am relatively new to Python and the only other language I have extensive programming with is VMS's DCL. Can anyone help? Thanks in advance for any help! Regards, Bruce Seelinger

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