Understanding of super functions in Python

The super function in Python understands the specific functions of the super () function based on the two parameters passed in:

The class name passed in by the first parameter determines the position of the current MRO. MRO (Method Resolution Order );

Use the self passed in by the second parameter to determine the current MRO list.

Def super (cls, inst): mro = inst. _ class __. mro () # determine the current MRO list return mro [mro. index (cls) + 1] # returns the next class

The following code:

class A(object):  def name(self):    print('name is xiaoming')    #super(A,self).name()class B(object):  def name(self):    print('name is cat')class C(A,B):  def name(self):    print('name is wang')    super(C,self).name()if __name__ == '__main__':  c = C()  print(c.__class__.__mro__)  c.name()

Run the above code output: when the super () function in class C is executed, the name function in Class A is actually called. The super () function is commented out in A, so it is not executed backward. The current MRO list is printed in the order of C, A, B, and object.

(
 
  , 
  
   , 
   
    , 
    
     )name is wangname is xiaoming
    
   
  
 

After removing the comments in class A, run the code output: you can see that the name () function in class B is executed after Class A is executed. If the super function still exists in B, the system continues to look up whether the object has the name () function.

(
 
  , 
  
   , 
   
    , 
    
     )name is wangname is xiaomingname is cat
    
   
  
 

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