“播放”未定义 - Pylance (reportUndefinedVariable)

Question

我刚刚开始学习 Python，并且在调用类时遇到问题。我正在使用 Visual Studio 代码。我已经查找了错误，但找不到任何有用的信息。到目前为止，我所有的经验都是关于 Java 的，我认为我可能会混淆一些东西。任何帮助将不胜感激！

print("Lets play a game!")

dotheywantotplay = input("Do you want to play Rock-Paper-Scissors? (y or n) ")

if dotheywantotplay == "y":

    player1 = input('Enter first players name: ')
    player2 = input('Enter second players name: ')

    personchoice1 = input("What move will you do? [\"Rock\", \"Paper\", \"Scissors\"]")

    personchoice2 = input("What move will you do? [\"Rock\", \"Paper\", \"Scissors\"]")

    Play(personchoice1,personchoice2) // The error looks like its this line

else:
    print("I am so sad now :-(")
    exit()


class Play:
    def __init__(player1, player2):

        if player1 == player2:
                print("Tie!")
        elif player1 == "Rock":
            if player2 == "Paper":
                print("You lose!", player2, "covers", player1)
            else:
                print("You win!", player1, "smashes", player2)
        elif player1 == "Paper":
            if player2 == "Scissors":
                print("You lose!", player2, "cut", player1)
            else:
                print("You win!", player1, "covers", player2)
        elif player1 == "Scissors":
            if player2 == "Rock":
                print("You lose...", player2, "smashes", player1)
            else:
                print("You win!", player1, "cut", player2)
        else:
            print("That's not a valid play. Check your spelling!")

以上是原问题，供以后参考。下面是解决方案。Python 与 Java 的不同之处在于，必须在引用类之前定义类。这意味着这些类必须位于 python 文件的顶部。希望这可以帮助其他一些尝试用 Python 编写程序的 Java 书呆子......

    print("Lets play a game!")
    
    dotheywantotplay = input("Do you want to play Rock-Paper-Scissors? (y or n) ")
    




print("Lets play a game!")

dotheywantotplay = input("Do you want to play Rock-Paper-Scissors? (y or n) ")



class Play:
    def __init__(self, player1, player2, name1, name2 ):

        self.player1 = player1
        self.player2 = player2
        self.name1 = name1
        self.name2 = name2


        if player1 == player2:
                print("Tie!")
        elif player1 == "Rock":
            if player2 == "Paper":
                print("You Win ", name2,"!")
                print(player2, "covers", player1)
            else:
                print("You Win ", name1,"!")
                print(player1, "smashes", player2)
        elif player1 == "Paper":
            if player2 == "Scissors":
                print("You Win ", name2,"!")
                print(player2, "cut", player1)
            else:
                print("You Win ", name1,"!")
                print(player1, "covers", player2)
        elif player1 == "Scissors":
            if player2 == "Rock":
                print("You Win ", name2,"!")
                print(player2, "smashes", player1)
            else:
                print("You Win ", name1,"!")
                print(player1, "cut", player2)
        else:
            print("That's not a valid play. Check your spelling!")


if dotheywantotplay == "y":

    player1 = input('Enter first players name: ')
    player2 = input('Enter second players name: ')

    personchoice1 = input("What move will you do? \"Rock\", \"Paper\", \"Scissors\"  ")
    personchoice2 = input("What move will you do? \"Rock\", \"Paper\", \"Scissors\"  ")

    Play(personchoice1,personchoice2, player1, player2)

else:
    print("I am sad now :-(")
    exit()

Answer 1

Python是从上到下执行的，所以所有的类和函数都应该在调用之前定义（所以放在顶部）。还

class Play:
    def __init__(player1, player2):
        self.player1 = player1
        self.player2 = player2

您应该像这样在类中定义属性，self它指的是类的当前实例，这里的所有内容。