super 理解

• super 解決了類繼承時候，不同類的同名稱方法繼承問題

• 當執行下面代碼的時候，代碼會報錯’Girl’ object has no attribute ‘height’，

• 兩個類（Girl 和Person)有相同的方法名稱，init 和about，當名稱相同時候子類的方法會覆蓋’父類’（這個父類的叫法有問題姑且這麼叫）

• 在子類Girl中，__init__方法已經覆蓋父類的方法，

• 當執行 E.about(‘Elisabeth’) ，這個about 是子類的about ,這個方法會用到height,但是這個功能在父類中的__init__的方法裏面，不好意思被覆蓋掉了，所以報錯了

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') 

在子類Girl裏面加上 super(Girl,self).init()，那麼父類的__init__方法下移，子類的__init__方法繼承了父類的功能

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') 

可以看出現在這個方法還是Girl 裏面的，因爲子類的同名方法覆蓋父類的方法

from Girl about +++++
 , Elisabeth is a hot girl ,she is about 180,and her age is 16

加載父類中的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