调用类方法时发生NameError

Question

试图理解python3.7中的类和方法。我继续运行下面的代码，但是不断得到这个NameError，它与我在Stats类的initialize方法中建立的points变量相关联。我相信这个错误是由于在识别局部/全局变量时遇到了一些问题，但我无法确定。有人有什么想法吗？你知道吗

class Stats:
    def __init__(self, points, rebounds, assists, steals):
        self.points = points
        self.rebounds = rebounds
        self.assists = assists
        self.steals = steals

    def tripDub(self):
        if points >= 10 and rebounds >= 10 and assists >= 10 and steals >= 10:
            return "Yes!"
        else:
            return "Nope!"

s = Stats(30, 20, 9, 5)
print("Did he earn a Triple Double? Result:", s.tripDub())

Answer 1

您需要在tripDub函数中使用self引用points、rebounds、assists和steals。你知道吗

例如：self.points

Answer 2

在引用实例变量之前需要self.：

class Stats:
    def __init__(self, points, rebounds, assists, steals):
        self.points = points
        self.rebounds = rebounds
        self.assists = assists
        self.steals = steals

    def tripDub(self):
        if self.points >= 10 and self.rebounds >= 10 and self.assists >= 10 and self.steals >= 10:
            return "Yes!"
        else:
            return "Nope!"


s = Stats(30, 20, 9, 5)
print("Did he earn a Triple Double? Result:", s.tripDub())