[Tutor] Comments appreciated

[Luis N]

Hi, 

Jeff Shanon, thanks for your help. I was wondering if there was a
function to automatically get the user on a *nix system, and had tried
the if __name__ == __main__ but didn't really get it until your
example. The only thing I'm not clear about is how 'trashcan' can be a
local variable inside main() when it's required by both trash() and
can()

The only thing that's missing is that this script can't handle paths
like ~/dir/junkthis

Would a regular expression be the best way of finding the last /
followed by some text to be able to chdir to junk files from another
location?

#!/usr/local/bin/python

import os.path
from os import mkdir, remove
from sys import argv
from shutil import rmtree

trashcan = os.path.expanduser("~/.trashcan")

def main(junk):
    empty = False
    if "-e" in junk:
        empty = True
        junk.remove("-e")

    if not os.path.exists(trashcan):
        os.mkdir(trashcan)

    if len(junk) > 0:
        trash(junk)

    if empty:
        can()

def trash(junk):
    for i in junk:
        toss = trashcan + "/" + i
        if os.path.exists(toss):
            if os.path.isdir(toss):
                rmtree(toss)
            if os.path.isfile(toss):
                os.remove(toss)
        os.rename(i, toss)

def can():
    for j in os.listdir(trashcan):
        toss = trashcan + "/" + j
        if os.path.isdir(toss):
            rmtree(toss)
        if os.path.isfile(toss):
            os.remove(toss)

if __name__ == '__main__':
    main(argv[1:])