python之super的使用小结

class Father:
 def whoami(self):
  print("I am father")


class Child:
 def whoami(self):
  print("I am child")
  Father.whoami(self)

Help on class super in module builtins:

class super(object)
 | super() -> same as super(__class__, <first argument>)
 | super(type) -> unbound super object
 | super(type, obj) -> bound super object; requires isinstance(obj, type)
 | super(type, type2) -> bound super object; requires issubclass(type2, type)
 | Typical use to call a cooperative superclass method:
 | class C(B):
 |   def meth(self, arg):
 |     super().meth(arg)
 | This works for class methods too:
 | class C(B):
 |   @classmethod
 |   def cmeth(cls, arg):
 |     super().cmeth(arg)

class A:
 def __init__(self):
  print("this is A")

class B(A):
 def __init__(self):
  super().__init__()
  print("this is B")

b = B()

"""
this is A
this is B
"""

class A:
 def __init__(self):
  print("this is A")
  print("leave A")

class B(A):
 def __init__(self):
  print("this is B")
  super().__init__()
  print("leave B")

class C(A):
 def __init__(self):
  print("this is C")
  super().__init__()
  print("leave C")
 

class D(B, C):
 def __init__(self):
  print("this is D")
  super().__init__()
  print("leave D")  
  
d = D()

"""
this is D
this is B
this is C
this is A
leave A
leave C
leave B
leave D
"""

print(D.__mro__)
"""
(<class '__main__.D'>, 
<class '__main__.B'>, 
<class '__main__.C'>, 
<class '__main__.A'>, 
<class 'object'>)
"""