Request for feedback on my first Python program

[Aahz]

In article <slrnbdeevn.694.andrew-usenet at athena.jcn.srcf.net>,
Andrew Walkingshaw  <andrew-usenet at lexical.org.uk> wrote:
>
>def main():
>    if len(sys.argv) != 2:
>        usage(sys.argv[0])
>    f = open(sys.argv[1], "r")

This is generally a Bad Idea; your functions should be generic and
sys.argv handling should be done under "if __name__=='__main__':".
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"In many ways, it's a dull language, borrowing solid old concepts from
many other languages & styles:  boring syntax, unsurprising semantics,
few automatic coercions, etc etc.  But that's one of the things I like
about it."  --Tim Peters on Python, 16 Sep 93