Python 应为缩进块，无法找到位置或原因

我似乎不明白为什么我的程序不能运行。它一直在说，我试着回去，确保我没有缩进太多或太少，但我似乎找不到问题。有人能帮忙吗？谢谢你

import random

userChoice = eval(input("Scissor (0), Rock (1), Paper (2)"))

computerChoice = random.randint(0,2)
if computerChoice == 0:
elif computerChoice == 1:
elif computerChoice == 2:

if userChoice == 0:
elif userChoice == 1:
elif userChoice == 2:

if userChoice == 0 and computerChoice == 0:
    print("The computer is Scissors. You are Scissors. It's a tie!")
elif userChoice == 0 and computerChoice == 1:
    print("The computer is Rock. You are Scissors. You lost")
elif userChoice == 0 and computerChoice == 2:
    print("The computer is Paper. You are Scissors. You won!")

if userChoice == 1 and computerChoice == 0:
    print("The computer is Scissors. You are Rock. You won!")
elif userChoice == 1 and computerChoice == 1:
    print("The computer is Rock. You are Rock. It's a tie!")
elif userChoice == 1 and computerChoice == 2:
    print("The computer is Paper. You are Rock. You lost")

if userChoice == 2 and computerChoice == 0:
    print("The computer is Scissors. You are Paper. You lost")
elif userChoice == 2 and computerChoice == 1:
    print("The computer is Rock. You are Paper. You won!")
elif userChoice == 2 and computerChoice == 2:
    print("The computer is Paper. You are Paper. It's a tie!")

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这些空if/elif语句需要有一个主体

python 2样式示例：

if computerChoice == 0:
    print 'Something needs to be done here'
elif computerChoice == 1:
    print 'Something needs to be done here too'
elif computerChoice == 2:
    print 'And something needs to be done here, too'

显然，用您试图做的一些实现来替换这些print语句。但那里不可能什么都没有

异常-如果确实不想执行任何操作，则可以接受pass语句

if computerChoice == 0:
    pass # do nothing here
elif computerChoice == 1:
    pass # do nothing here
elif computerChoice == 2:
    pass # do nothing here

if-elif块中缺少冒号后面的语句。您可以尝试添加pass

Python中的pass语句在需要语句时使用 但您不希望执行任何命令或代码

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您有空的if/elif语句。另外，使用int而不是eval@AndrewL。嗨，安德鲁，你说我有空的if/elif语句是什么意思？我不明白。你不能有一个空的控制语句，所以如果…：如果里面没有任何语句，则无效查看第6-8行、第10-12行。我不知道if/elif需要语句的主体，因为我认为if/elif已经是语句了。对不起，我对编码很陌生。谢谢你的澄清，非常感谢。@DandyPotato:但是如果你不想在条件满足时做任何事情，为什么你会有那些if和elif语句呢？例如，如果三个条件中只有一个得到满足，你可以做一些事情，而对另外两个条件什么也不做。对所有条件使用pass是没有意义的，但它可能只适用于某些条件。@Mathias虽然在这种情况下，它可能不适用于您通知我有关命令pass的信息，但我只是尝试了一下，它可以工作：。我对编码还是相当陌生的。

computerChoice = random.randint(0,2)
if computerChoice == 0:
    pass
elif computerChoice == 1:
    pass
elif computerChoice == 2:
    pass