super 理解
原创
©著作权归作者所有：来自51CTO博客作者luoganttcc的原创作品，请联系作者获取转载授权，否则将追究法律责任
- super 解决了类继承时候，不同类的同名称方法继承问题
- 当执行下面代码的时候，代码会报错’Girl’ object has no attribute ‘height’，
- 两个类（Girl 和Person)有相同的方法名称，init 和about，当名称相同时候子类的方法会覆盖’父类’（这个父类的叫法有问题姑且这么叫）
- 在子类Girl中，__init__方法已经覆盖父类的方法，
- 当执行 E.about(‘Elisabeth’) ，这个about 是子类的about ,这个方法会用到height,但是这个功能在父类中的__init__的方法里面，不好意思被覆盖掉了，所以报错了
class Person:
def __init__(self):
self.height=180
def about(self,name):
print('from Person about++++{} , {} is about {}'.format('\n',name,self.height))
class Girl(Person):
def __init__(self):
self.age=16
def about(self,name):
print('from Girl about +++++{} , {} is a hot girl ,she is about {},and her age is {}'.format('\n',name,
self.height,self.age))
if __name__=='__main__':
E=Girl()
E.about('Elisabeth')
在子类Girl里面加上 super(Girl,self).init()，那么父类的__init__方法下移，子类的__init__方法继承了父类的功能
class Person:
def __init__(self):
self.height=180
def about(self,name):
print ('from Person about++++{} , {} is about {}'.format('\n',name,self.height))
class Girl(Person):
def __init__(self):
super(Girl,self).__init__()
self.age=16
def about(self,name):
print('from Girl about +++++{} , {} is a hot girl ,she is about {},and her age is {}'.format('\n',name,
self.height,self.age))
if __name__=='__main__':
E=Girl()
E.about('Elisabeth')
可以看出现在这个方法还是Girl 里面的，因为子类的同名方法覆盖父类的方法
from Girl about +++++
, Elisabeth is a hot girl ,she is about 180,and her age is 16
加载父类中的about方法
class Person:
def __init__(self):
self.height=180
def about(self,name):
print('from Person about++++{} , {} is about {}'.format('\n',name,self.height))
class Girl(Person):
def __init__(self):
super(Girl,self).__init__()
self.age=16
def about(self,name):
super(Girl,self).about(name)
print ('from Girl about +++++{} , {} is a hot girl ,she is about {},and her age is {}'.format('\n',name,
self.height,self.age))
if __name__=='__main__':
E=Girl()
E.about('Elisabeth')
from Person about++++
, Elisabeth is about 180
from Girl about +++++
, Elisabeth is a hot girl ,she is about 180,and her age is 16
