生成随机密码：
from random import choice
from string import ascii_letters, digits
all_chs = ascii_letters + digits
def mk_pass(n=8):
result = ''
for i in range(n):
ch = choice(all_chs)
result += ch
return result
if __name__ == '__main__':
a1 = mk_pass(10)
a2 = mk_pass()
print(a1)
print(a2)