import random
player = input("请输入数字，0代表剪刀，1代表石头，2代表布")
computer = random.randint(0, 2)
print("player选择了%s" % player, "computer选择了%s" % computer)
if player == computer:
print("平局")
elif player == "0":
if computer == "1":
print("你输了")
else:
print("你赢了")
elif player == "1":
if computer == "2":
print("你输了")
else:
print("你赢了")
elif player == "2":
if computer == "0":
print("你输了")
else:
print("你赢了")
computer = random.randint(0, 2)返回的是int类型
把 computer = random.randint(0, 2)
改成 computer = str(random.randint(0, 2))