Question

我在python中学习OOP并试图以OOP风格运行这个小游戏，但由于某种原因，系统找不到对象的属性。

问题在于：

Traceback (most recent call last):
File "HelloUsername.py", line 47, in <module>
    newGameGTN = GuessTheNumber()
File "HelloUsername.py", line 6, in __init__
    self.start_game()
File "HelloUsername.py", line 32, in start_game
    player = player_choice()
NameError: name 'player_choice' is not defined

在python 3中使用此代码：

from random import randint
class GuessTheNumber(object):
    """docstring for GuessTheNumber"""
    def __init__(self):
        self.start_game()
        self.player_choice()
        self.compare_numbers()

    def player_choice(self):
        choice = int(input("Choose your number: "))
        if choice in range(101):
                return(choice)
            else:
                print("Please enter a number 0-100")
                player_choice()

    def compare_numbers(self, computer, player):
        if player == computer:
            return(0)
        elif player > computer:
            return(1)
        elif player < computer:
            return(-1)

    def start_game(self):
        computer = randint(0, 100)
        turn = 0
        for turn in range(3):
            player = player_choice()
            x = compare_numbers(computer, player)
            print(computer)
            if x == -1:
                print("too small")
            elif x == 1:
                print("too big")    
            elif x == 0:
                print("you win")
                break   
                turn += 1
            print("game over")

newGameGTN = GuessTheNumber()
newGameGTN.start_game()

Answer 1

NameError与AttributeError（您在问题摘要中提到的）不同。 NameError异常表示代码中引用的名称不存在。名称可以是局部变量，也可以是封闭范围中的变量。

需要在该类的实例上调用类中的所有方法。（静态方法和类方法不能承受）而不是name = player_choice()你需要写name = self.player_choice()。同样适用于调用类中定义的方法的所有其他事件。

猜数字，没有这样的属性，python 3

1 个答案: