Permutations using methods:

 #Permutations using methods:

* all permutations 

    from itertools import permutations

    p=permutations([1,2,3,4])

    for i in list(p):

        print(i)

*permutations by using length.

    from itertools import permutations

    n=int(input())

    p=permutations([1,2,3,4],n)

    for i in list(p):

        print(i)