Python练习实例001

#! /usr/bin/env python3
# -*- coding:utf-8 -*-

# Author   : Ma Yi
# Blog     : http://www.cnblogs.com/mayi0312/
# Date     : 2020-06-18
# Name     : demo001
# Software : PyCharm
# Note     : 有四个数字：1、2、3、4，能组成多少个互不相同且无重复数字的三位数？各是多少？


# 入口函数
if __name__ == ‘__main__‘:
    temp_list = [1, 2, 3, 4]
    count = 0
    for i in temp_list:
        for j in temp_list:
            for k in temp_list:
                if i != j and i != k and j != k:
                    print(i, j, k)
                    count += 1

    print("Total count: %d" % count)

1 2 3
1 2 4
1 3 2
1 3 4
1 4 2
1 4 3
2 1 3
2 1 4
2 3 1
2 3 4
2 4 1
2 4 3
3 1 2
3 1 4
3 2 1
3 2 4
3 4 1
3 4 2
4 1 2
4 1 3
4 2 1
4 2 3
4 3 1
4 3 2
Total count: 24