Python 列舉

Python List: Exercise - 18 with Solution

Write a Python program to generate all permutations of a list in Python.

In mathematics, the notion of permutation relates to the act of arranging all the members of a set into some sequence or order, or if the set is already ordered, rearranging (reordering) its elements, a process called permuting. These differ from combinations, which are selections of some members of a set where order is disregarded.

In the following image each of the six rows is a different permutation of three distinct balls.

Pictorial Presentation

Sample Solution:-

Python Code:

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

Sample Output:

[(1, 2, 3), (1, 3, 2), (2, 1, 3), (2, 3, 1), (3, 1, 2), (3, 2, 1)]