调用类方法时出现名称错误

Question

试图理解Python 3.7中的类和方法。我继续运行下面的代码，但不断得到这个 NameError，与我在 Stats 类的初始化方法中建立的点变量相关联。我相信错误是识别局部/全局变量时出现问题的结果，但无法将其放在上面。有人有什么想法吗？

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

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())

Answer 2

你需要引用points、rebounds、assists和steals在tripDub函数中使用self。

示例：self.points