# 生成指定长度指定类型的随机字符串，参数：长度、类型

import random
def random_str(length=5,kind = 2):
    if kind ==0 :
        base_str = '0123456789'
    elif kind == 1 :
        base_str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
    elif kind == 2:
        base_str = '[],./!@#$%^&*()_+|<>'
    return ''.join(random.choice(base_str) for i in range(length))

print(random_str())