Python的多态
#!/usr/bin/env python#coding:utf-8
class Point:
def __init__(self,x,y):
self.x = x
self.y = y
def __add__(self,oth):
return Point(self.x + oth.x , self.y + oth.y)
def info(self):
print(self.x,self.y)
# class D3Point(Point):
# def __init__(self,x,y,z):
# super().__init__(x,y)
# self.z = z
# def __add__(self,oth):
# return D3Point(self.x + oth.x , self.y + oth.y , self.z + oth.z)
# def info(self):
# print(self.x,self.y,self.z)
class D3Point:
def __init__(self,x,y,z):
self.x = x
self.y = y
self.z = z
def __add__(self,oth):
return D3Point(self.x + oth.x , self.y + oth.y , self.z + oth.z)
def info(self):
print(self.x,self.y,self.z)
def myadd(a,b):
return a + b#相同的类型才能相加，调用的是__add__方法
if __name__ == '__main__':
myadd(Point(1,2),Point(3,4)).info()#(4, 6)
myadd(D3Point(1,2,3),D3Point(4,5,6)).info() #(5, 7, 9)
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