#!/usr/bin/python env # coding:utf-8 import random def code(num=6): res = "" for i in range(num): # 数字0-9 num1 = str(random.randint(0, 9)) # 大写字母A-Z # a = chr(random.randint(65, 90)) # 小写字母a-z # b = chr(random.randint(97, 122)) # res += random.choice([num1, b]) res += random.choice([num1]) return res a = code() print(a)