Python除以零错误

Question

我在python中有一个Class,具有以下属性:

    self.number1 = 0
    self.number2 = 0
    self.divided = self.number1/self.number2

这当然会抛出零误差:

ZeroDivisionError:整数除法或模数为零

这个想法是我稍后会增加number1和number2,但是self.divided会自动更新吗？如果是自动更新,那么如何解决零错误？谢谢.

Answer 1

不,self.divided是一个简单的属性,不会自动更新.对于动态属性,请使用property:

class Foo(object):
    number1 = 0
    number2 = 0

    @property
    def divided(self):
        return self.number1 / self.number2

Answer 2

避免ZeroDivisionError自动更新:

@property
def divided(self):
    try:
        #suppose that number2 is a float
        return self.number1/self.number2
    except ZeroDivisionError:
        return None