Python 3.x Python 3；石头剪刀-只是不断选择一个结果

写一个小RPS游戏，我遇到了一个问题

1） 当我运行函数玩游戏时，它总是以“平局”的形式返回 即使我选择了一个失败的变量，比如cpu=石头，玩家=剪刀

我有点被难住了。当我遇到麻烦时，我通常潜伏在stackoverflow论坛，但我从未遇到过有同样问题的人（即使这里有太多的RPS问题）

现在，我不是要求任何人为我编写并100%测试它，而是告诉我错误点，我会去排除故障

谢谢

def showRules():
    print("********** Rock, Paper, Scissors **********")
    print("Rules: Each player chooses either Rock, Paper, or Scissors.")
    print("       The winner is determined by the following rules:")
    print("       Scissors cuts Paper -> Scissors wins")
    print("       Paper covers Rock   -> Paper Wins")
    print("       Rock smashes Scissors -> Rock Wins")
    print("*******************************************")

def getCPUChoice():
    choices = ["rock", "paper", "scissors"]
    from random import randint
    randNum = randint(0,2)
    cpuchoice = choices[randNum]
    print(cpuchoice)
    return

def getUserChoice():
    choices = ["rock", "paper", "scissors"]
    userchoice = input('Please choose either rock, paper or scissors:').lower()
    print(userchoice)
    return

def declareWinner(user, computer):
    if user == computer:
        print("Tie!!")
    elif user == "rock" and computer == "paper":
        print("You lose!")
    elif user == "paper" and computer == "scissors":
        print("You lose!")
    elif user == "scissors" and computer == "rock":
        print("You lose!")


def playGame():
    showRules()
    computer = getCPUChoice()
    user = getUserChoice()
    declareWinner(user, computer)

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在getCPUChoice和getUserChoice中，您正在打印选择而不是返回它们。将这些函数末尾的返回值更改为

    return cpuchoice

及

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分别。

在任何情况下都不返回任何内容。。。因此user=None，computer=None。谢谢！我让它工作了。现在，只是为了让它更具审美吸引力。

    return userchoice