如何根据值更改 Python 类/对象的一个​​或多个属性

Question

我想创建一个 Python 类来存储学生的姓名和成绩，并检查成绩是否在正确的范围内（0-10）。

有没有办法将大于10的属性改为0（不是一一）？

class Student:
    def __init__(self, name, lastName, programming, algebra,
             calculus, physics, writing):
        self.name = name
        self.lastName = lastName
        self.programming = programming
        self.algebra = algebra
        self.calculus = calculus
        self.physics = physics
        self.writing = writing
    def check(self):
        if self.programming or self.algebra or self.calculus or self.physics or self.writing not in range(11):
            #Change the value of the attributes which are > 10 to 0
        #Is there any way to do it apart from this one?
        #if self.programming not in range(11):
            #self.programming = 0
        #if self.algebra not in range(11):
            #self.algebra = 0
         ................... 

Answer 1

您可以使用属性和 setter 并防止 setter 中的错误值：

class Student:
    def __init__(self, name, programming ):
        self.name = name
        self.programming = programming # using the setter so our business rule is applied

    @property
    def programming(self):
        return self._programming

    @programming.setter
    def programming(self,n):
        # apply the businessrule of n being in 1 to 10 else 0
        self._programming = n if 0 < n < 11 else 0


studs = [ Student("Enya",20), Student("Eric",0), Student("Karl",5)]

for s in studs:
    print(s.name, s.programming)

输出：

Enya 0
Eric 0
Karl 5

在python.org property() 和 @property 上阅读有关@property 的更多信息