#!/usr/bin/env python # -*- coding:utf-8 -*- import os import random import string la=[0,1,2,3,4,5,6,7,8,9] print(random.seed(10)) print(random.getrandbits(3)) #16位小数 re=print(random.random()) # 15位小数 re=print(random.uniform(0,9)) re=print(random.randrange(3)) re=print(random.randrange(0,9,1)) re=print(random.randint(0,9)) #随机选择一位元素 非空序列 re=print(random.choice(la)) re=print(random.choices(la,weights=None,cum_weights=2,k=3)) #生成k=3个元素组成的列表，根据权重去生成 print(random.choices([3,6,9], [2, 5, 7], k=3)) # re=print(random.shuffle(['a','ff','cc','test'])) #生成新的序列 不重复 k为 元素个数 re=print(random.sample(la,k=5)) #根据生成的字符次数情况算概率 trial = lambda: random.choices('HT', cum_weights=(0.60, 1.00), k=7).count('H') >= 5 re=sum(trial() for i in range(10000)) / 10000 print(re) trial = lambda : 2500 <= sorted(random.choices(range(10000), k=5))[2]  < 7500 re=sum(trial() for i in range(10000)) / 10000 print(re) #生成随机数包含大写字母+数字 checkcode = '' for i in range(4):     current = random.randrange(0,4)     if current != i:         temp = chr(random.randint(65,90))     else:         temp = random.randint(0,9)     checkcode += str(temp) print(checkcode) #指定生成位数的随机数 包含字母和数字 def gen_random_string(length):     # 数字的个数随机产生     num_of_numeric = random.randint(1,length-1)     # 剩下的都是字母     num_of_letter = length - num_of_numeric     # 随机生成数字     numerics = [random.choice(string.digits) for i in range(num_of_numeric)]     # 随机生成字母     letters = [random.choice(string.ascii_letters) for i in range(num_of_letter)]     # 结合两者     all_chars = numerics + letters     # 洗牌 对序列随机排序     random.shuffle(all_chars)     # 生成最终字符串     result = ''.join([i for i in all_chars])     # result = ''.join(all_chars)     return result if __name__ == '__main__':     print(gen_random_string(4))