newbie q

[Stephen Thorne]

On Thu, 13 Jan 2005 17:05:39 +1000, Egor Bolonev <ebolonev at mail.ru> wrote:
> 
> "Stephen Thorne" <stephen.thorne at gmail.com> сообщил/сообщила в новостях
> следующее: news:mailman.611.1105598828.22381.python-list at python.org...
> On Thu, 13 Jan 2005 15:55:10 +1000, Egor Bolonev <ebolonev at mail.ru> wrote:
> > how to get rid of 'for' operator in the code?
> >
> > import os, os.path
> >
> > def _test():
> >     src = 'C:\\Documents and Settings\\Егор\\My Documents\\My Music\\'
> >
> >     for i in [x for x in os.listdir(src) if
> > os.path.isfile(os.path.join(src,
> > x)) and len(x.split('.')) > 1 and x.split('.')[-1].lower() == 'm3u']:
> >         os.remove(os.path.join(src, i))
> >
> > if __name__ == '__main__':
> >     _test()
> 
> import glob
> for x in glob.glob("*.m3u"):
>     os.remove(x)
> 
> i want to wipe out 'for x in []: f(x)' using map, lambda, reduce, filter and
> List
> Comprehensions [x for x in []]
> just don't get how to add string to all elements of list

Here's a few ways,

map(os.remove, glob.glob("*.m3u"))
[os.remove(x) for x in glob.glob("*.m3u")]

[os.remove(x) for x in os.listdir(src) if
 os.path.isfile(os.path.join(src, x)) 
 and len(x.split('.')) > 1 
 and x.split('.')[-1].lower() == 'm3u']

def myfilter(x):
  return os.path.isfile(os.path.join(src, x))  and len(x.split('.')) >
1  and x.split('.')[-1].lower() == 'm3u'
map(os.remove, filter(myfilter, os.listdir(src)))

Regards,
Stephen Thorne.