Python beginner confused by a complex line of code
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by Protean
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Published on 2010-04-06T00:34:51Z
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2010/04/06
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I understand the gist of the code, that it forms permutations; however, I was wondering if someone could explain exactly what is going on in the return statement.
def perm(l):
sz = len(l)
print (l)
if sz <= 1:
print ('sz <= 1')
return [l]
return [p[:i]+[l[0]]+p[i:] for i in range(sz) for p in perm(l[1:])]
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