Python的方法解析順序(MRO)

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mro即method resolution order，主要用於在多繼承時判斷調的屬性的路徑(來自於哪個類)。

http://blog.csdn.net/imzoer/article/details/8737642

 

你真的理解Python中MRO演算法嗎？

 API:

 1 class type(object): 2     """ 3     type(object) -> the object‘s type 4     type(name, bases, dict) -> a new type 5     """ 6     def mro(self): # real signature unknown; restored from __doc__ 7         """ 8         mro() -> list 9         return a type‘s method resolution order10         """11         return []

 

測試代碼:

 1 #!/usr/bin/env python 2 class A(object): 3     def __init__(self): 4         print "enter A" 5         print("leave A") 6  7  8 class B(object): 9     def __init__(self):10         print "enter B"11         print "leave B"12 13 14 class C(A,B):15     def __init__(self):16         print "enter C"17         super(C, self).__init__()18         print "leave C"19 20 b = C()21 mo = b.__class__.mro()22 print mo

 

輸出:

enter C
enter A
leave A
leave C
[<class ‘__main__.C‘>, <class ‘__main__.A‘>, <class ‘__main__.B‘>, <type ‘object‘>]

Python的方法解析順序(MRO)