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December 23, 2015 08:39
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all_permutation
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| def all_perm(l): | |
| if not l: | |
| return [[]] | |
| return [[a] + b for a in l for b in all_perm(_remove(l, a))] | |
| def _remove(l, item): | |
| tmp = l[:] | |
| tmp.remove(item) | |
| return tmp | |
| >>> all_perm([1, 2, 3, 4]) |
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