Answers for "python fastest way to get permutations"

all permutations python

import itertools
print(list(itertools.permutations([1,2,3])))

Using python permutations function on a list

from itertools import permutations
a=permutations([1,2,3,4],2) 
for i in a: 
   print(i)

python all permutations of a string

>>> from itertools import permutations
>>> perms = [''.join(p) for p in permutations('stack')]
>>> perms