Expert Python programming-reading Notes

1. Mro:method Resolution Order

Lookup Order:

L (MyClass) = [MyClass, merged (L (BASE1), L (BASE2), Base1, Base2)]

2. Super (...)

All parents must call super, or there will be unpredictable problems

3. Class variable & instance variable

Lookup Order

can be accessed through self.x, so instance variable overrides class variable, and class variable can be used to define a default value for instance variable.

If it is mutable, there will be some special

4. Descriptor

Only defined at class level, you can define different value for class variable per instance by recording the value of each setting in the instance.

Expert Python programming-reading Notes