1.猜拳:
import random
list = ['石头','剪刀','布']
y = input('''
(0) 石头
(1) 剪刀
(2) 布
请出拳(0/1/2)：
*******************''')
computer = random.choice(list)
you = list[int(y)]
win_list = [['石头','剪刀'],['剪刀','布'],['布','石头']]
if [you,computer] in win_list:
    print('你出拳:%s,电脑出拳:%s,你赢了!' % (you,computer))
elif you == computer:
    print('平局!!!')
else:
    print('你出拳:%s,电脑出拳:%s,你输了!' % (you,computer))

2.随机n位密码
import random
import string
result = ''
i = 1
n = int(input('随机生成几位密码:'))
char = string.ascii_letters + string.digits + '_'
while i<=n:
    a = random.choice(char)
    result += a
    i += 1
print(result)