> > list.insert returns None. Thus, except in the one-element case, your > generator is yielding None all the time. >
Oh god...silly me.
Thank you guys for the help :)
P.S I'm dead stubborn, so here's what I did to fix my code:
def perm(seq):
"Reshuffles the elements of seq in every possible way"
if len(seq) == 1:
yield seq
else:
for i in range(len(seq)):
for p in perm(seq[1:]):
# Here:
p.insert(i, seq[0])
yield p
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