hello to all!

I'm new to python , worked with regexp in javascript only, and I'm stuck with one little problem, I want to know if File has extension: .zip .7z .gz .tar ...(only Compressed Files).

But if it's .rar, it must not be xxx.partN.rar ('N' is a number and 'xxx' can be anything) UNLESS 'N' is '1' or '01' '001' etc.

Any help will be greatly appreciated.

: hello to all!
:
: I'm new to python , worked with regexp in javascript only, and I'm
: stuck with one little problem, I want to know if File has extension:
: .zip .7z .gz .tar ...(only Compressed Files).
:
: But if it's .rar, it must not be xxx.partN.rar ('N' is a number and
: 'xxx' can be anything) UNLESS 'N' is '1' or '01' '001' etc.
:
: Any help will be greatly appreciated.
:

import re
rar = re.compile(".+\.part[^(0*1)]\.rar") #invalid rar's
ext_list = ['zip','7z', 'gz', 'tar', 'rar'] #and whatever else

def foo(n):
  if n[n.rfind('.') + 1:] in ext_list: 
    if not n[-3:] == 'rar':
      return True                #valid not rar file
    elif rar.match(n):
      return False               #invalid rar file
    return True                  #valid rar file
  return False                   #not in ext_list
[\code]