python permutations code example

Example 1: all permutations python

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

Example 2: python npr permutation calculation

# as of python 3.8
>>> import math
>>> print(math.perm(3, 3))
6

Example 3: pyhton permutations

# A Python program to print all permutations using library function 
from itertools import permutations
perm = permutations([1, 2, 3])
for i in list(perm):
    print (i)
# (1, 2, 3)
# (1, 3, 2)
# (2, 1, 3)
# (2, 3, 1)
# (3, 1, 2)
# (3, 2, 1)

Example 4: python all permutations of a string

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

Example 5: python permutation

import itertools

a = [1, 2, 3]
n = 3

perm_iterator = itertools.permutations(a, n)

for item in perm_iterator:
    print(item)

Example 6: import permutations

from itertools import permutations