Python面向对象中super用法与MRO机制

Python面向对象中super用法与MRO机制

最近再看trackformer，里面用到了super的用法，记录一下super的用法

class A(object):def __init__(self):print('init A')def fun(self):print('A.fun')print(self)super(A, self).fun()class B(object):def __init__(self) :print('init B')def fun(self):print('B.fun')class C(object):def __init__(self):print('init C')def fun(self):print('C.fun')class D(A,B):def __init__(self):print('init D')def fun(self):print('D.fun')print(self)super(D, D()).fun()
class E(B, C):def __init__(self):print('init E')def fun(self):print('E.fun')super().fun()class F(D, E):def __init__(self):print('init F')def fun(self):print('F.fun')print(self)super().fun()
f = F()
f.fun()

# putput
init F
F.fun
<__main__.F object at 0x7f75377a1850>
D.fun
<__main__.F object at 0x7f75377a1850>
init D
A.fun
<__main__.D object at 0x7f75377a1910>
B.fun

super().fun()等价于super(class_, self).fun()