re 模块简单运用

import random
from random import randint, choice, sample

# for i in range(20):
#     test = random.randint(1, 10)#1-10之间的整数，包括1和10
#     # test1=random.random()#0到1 之间的小数
#     # test2=random.uniform(1,5)#从开始到结束之间的数，包括整数和小数
#     print('我是test',test)
#     # print('我是test2',test2)
#
#     # print('我是test1',test1)

# def rand_int(start,stop):
#     '''
#
#     :param start: 开始数字
#     :param stop: 结束或停止数字
#     :return: 返回值
#     '''
#     a=random.random()#（0-1）之间的随机数
#     print(a)
#     print(a*(stop-start))
#     return round(a*(stop-start)+start)
#
# print(rand_int(1,10))


#
# def rand_str(l=4,t=0):
#     '''
#
#     :param l: 指定参数与值
#     :param t: 指定参数与值
#     :return:
#     '''
#     s = ''
#     if t == 0:      # 纯数字
#         for i in range(l):
#             # s = s + chr(randint(ord('0'), ord('9')))
#             s = s + str(randint(0, 9))
#             print(s)
#     elif t == 1:    # 纯字母
#         base_str = 'abcdefghijklmnopqrstuvwxyz'
#         # s = ''.join(sample(base_str, l))#sample(base_str, l)从字符串中随机选出l个元素
#         # y=choice(base_str)#choice(base_str)字符串中随机选择一个
#         # print(y)
#         # s = ''.join( y for i in range(l))#误区这里面的y与choice(base_str)并不等价，只是把值赋给了y
#         s = ''.join( choice(base_str) for i in range(l))
#     else:    # 数字字母混合
#         pass
#     return s
#
#
# print(rand_str(4,0))#指定的参数只可以改变，也可以把指定参数l,t去除