get all possible combinations of characters given a string

allperms.py

def allperm(inputstr):
    for i in range(len(inputstr)):
        yield(inputstr[i])        
        for s in allperm(inputstr[:i] + inputstr[i+1:]):
            yield(inputstr[i] + s)
inputstr = "abc"
for n in allperm(inputstr):
        print n
import sys
from itertools import permutations

inputstr = sys.argv[1].upper()
print inputstr
perms = (p for p in permutations(inputstr))
for p in perms:
        print ''.join(p)