Python3基础 __add__,__sub__ 两个类的实例相互加减 - Python

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Python : 3.7.0

OS : Ubuntu 18.04.1 LTS

IDE : PyCharm 2018.2.4

Conda : 4.5.11

typesetting : Markdown

code

"""

@Author : 行初心

@Date   : 18-9-23

@Blog   : www.cnblogs.com/xingchuxin

@Gitee  : gitee.com/zhichengjiu

"""

class MyClass:

    def __init__(self, height, weight):

        self.height = height

        self.weight = weight

    # 两个对象的长相加，宽不变.返回一个新的类

    def __add__(self, others):

        return MyClass(self.height + others.height, self.weight + others.weight)

    # 两个对象的宽相减，长不变.返回一个新的类

    def __sub__(self, others):

        return MyClass(self.height - others.height, self.weight - others.weight)

    # 说一下自己的参数

    def intro(self):

        print("高为", self.height, " 重为", self.weight)

def main():

    a = MyClass(height=10, weight=5)

    a.intro()

    b = MyClass(height=20, weight=10)

    b.intro()

    c = b - a

    c.intro()

    d = a + b

    d.intro()

if __name__ == '__main__':

    main()

result

/home/coder/anaconda3/envs/py37/bin/python /home/coder/PycharmProjects/oop/demo.py

高为 10  重为 5

高为 20  重为 10

高为 10  重为 5

高为 30  重为 15

Process finished with exit code 0