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Generate All Permutation Of A List

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        From Michael Davies's <a href=>recipe</a>.
def all_perms(str):
    if len(str) <=1:
        yield str
        for perm in all_perms(str[1:]):
            for i in range(len(perm)+1):
                yield perm[:i] + str[0:1] + perm[i:]
Some example usage
>>> for p in all_perms(['a','b','c']):
	print p

['a', 'b', 'c']
['b', 'a', 'c']
['b', 'c', 'a']
['a', 'c', 'b']
['c', 'a', 'b']
['c', 'b', 'a']
A great use of generator and recursive call.    


Snippets Manager replied on Mon, 2006/03/06 - 2:54am

Thanks, that's just what I was looking for