All possible unique permutations

Problem to find the unique permutation in given list.

Example-1:

Input    : n = [ 1, 2, 1]
Output   : [[1, 1, 2], [1, 2, 1], [2, 1, 1]]

Example-2:

Input    : n = [ 1, 2, 3]
Output   : [[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]]

Solution

from itertools import permutations

n = [ 1, 2, 1]

a = list(permutations(n,3))

b = set(a)

c = [list(x) for x in list(b)]

d = sorted(c)

print(d)

Output

[[1, 1, 2], [1, 2, 1], [2, 1, 1]]