removing comments form a file

[Noud Aldenhoven]

Ah, 

Thank you, I never thaught about the re module. Now I can do some cool stuf.

Greetings,
Noud Aldenhoven

ps. Zal ik een keer langs komen? ;-P

wittempj at hotmail.com wrote:

> You cold do something like this:
> 
>>>> import re
>>>> commentpattern = re.compile('.*(?=//)|.*(?!//)')
>>>> stringwithcomment = 'Blah di blah // some comment'
>>>> match = commentpattern.match(stringwithcomment)
>>>> match.group()
> 'Blah di blah '
>>>> stringwithoutcomment = 'Blah di blah'
>>>> match = commentpattern.match(stringwithoutcomment)
>>>> match.group()
> 'Blah di blah'
>>>> blankline = '\n'
>>>> match = commentpattern.match(blankline)
>>>> match.group()
> ''
>>>>
> 
> and put this in a loop where you iterate over your file.
> Martin (The Netherlands, Amsterdam, bij Diemen)
> 
> Noud Aldenhoven wrote:
>> Hello everyone,
>>
>> I was wondering how to remove comments away form a file.
>> So that's why I made this script.
>>
>> ===============================
>> #!/usr/bin/env python
>>
>> import sys
>> import string
>> import time
>>
>> helptext = "usage: python rmcomment [oldfile] [newfile] [comment]"
>>
>> def rmcomment(oldfile, newfile, comment):
>>     oldfile = open(oldfile, 'r')
>>     newfile = open(newfile, 'w')
>>     ccount = 0
>>     lcount = 0
>>     for line in oldfile.readlines():
>>         splitline = string.split(line)
>>         pstest = 0
>>         fileline = ""
>>         for word in splitline:
>>             if word[:2] == comment:
>>                 pstest = -1
>>                 ccount += 1
>>                 pass
>>             elif pstest == -1:
>>                 pass
>>             else:
>>                 fileline += word + " "
>>         if len(fileline) == 0:
>>             pass
>>         else:
>>             newfile.write(fileline + "\n")
>>             lcount += 1
>>     print "Done... in %s seconds\nRemoved comment from %s
> lines\nWrote %
>> lines to %s" % (time.time()-start , ccount, lcount, newfile)
>>     raw_input("Push the enter button to quit>")
>>
>> if __name__ == "__main__":
>>     if sys.argv[1] == "-h" or sys.argv[1] == "-help":
>>         print helptext
>>     else:
>>         start = time.time()
>>         oldfile = sys.argv[1]
>>         newfile = sys.argv[2]
>>         comment = sys.argv[3]
>>         rmcomment(oldfile, newfile, comment)
>>
>>
>> ========================================
>>
>> This script works fine with standard text files. An example is this
> one:
>>
>> example.txt:
>>
>> Hello Fuckin' World //how are you doing today
>> //I think it delete this sentence and the next sentence too!
>>
>> But this one not! #Even not this comment
>>
>> end example.txt
>>
>> If I use my script, named rmcomment.py I get this:
>>
>> jwaixs at linux:~/programmeren/python/rmcomment$ cat example.txt
>> Hello Fuckin' World //how are you doing today
>> //I think it delete this sentence and the next sentence too!
>>
>> But this one not! #Even not this comment's
>> jwaixs at linux:~/programmeren/python/rmcomment$ python rmcomment.py
>> example.txt newexample.txt //
>> Done... in 0.00104999542236 seconds
>> Removed comment from 2 lines
>> Wrote  2nes to <open file 'newexample.txt', mode 'w' at 0x403e1c60>
>> Push the enter button to quit>
>> jwaixs at linux:~/programmeren/python/rmcomment$ cat newexample.txt
>> Hello Fuckin' World
>> But this one not! #Even not this comment
>> jwaixs at linux:~/programmeren/python/rmcomment$
>>
>> works fine... but here's my problem. If I use rmcomment.py also the
>> whitelines will be removed. And I don't want that to happen. Here's
> another
>> example:
>>
>> jwaixs at linux:~/programmeren/python/rmcomment$ cat otherexample.txt
>> //This shows what whitelines are doing here
>>        left from me is a nice white line tabs
>>             and here left are at least 3 white line tabs
>>
>> //and ofcourse, comments will be deleted
>> jwaixs at linux:~/programmeren/python/rmcomment$ python rmcomment.py
>> otherexample.txt newotherexample.txt //
>> Done... in 0.0011351108551 seconds
>> Removed comment form 2 lines
>> Wrote  2nes to <open file 'newotherexample.txt', mode 'w' at
> 0x403e1c60>
>> Push the enter button to quit>
>> jwaixs at linux:~/programmeren/python/rmcomment$ cat newotherexample.txt
>> left from me is a nice white line tabs
>> and here left are at least 3 white line tabs
>> jwaixs at linux:~/programmeren/python/rmcomment$
>>
>> My beautiful whitelines are gone! And I don't want that!
>> I've thaught how to fix this for a time, but I can't make it on my
> own. Too
>> less programming experiance, I'm afraid.
>> Could someone help me with this problem? Or fix the script or give a
> hint or
>> something?
>>
>> Thank you at least for reading this post,
>>
>> Noud Aldenhoven
>> The Netherlands (In de beurt bij Nijmegen, voor de nieuwschierigen)
>>
>> ps. Yes, I'm a Dyslextion and can't write correct english. I'm sorry
> for
>> that.