Monkey-patch Python class

Question

I\'ve got a class, located in a separate module, which I can\'t change.

from module import MyClass

class ReplaceClass(object)
  ...

MyClass = ReplaceClass
         


        

Answer 1

import some_module_name

class MyClass(object): 
     ... #copy/paste source class and update/add your logic

some_module_name.MyClass = MyClass

Its preferable not to change the name of class while replacing, because somehow someone may have referenced them using getattr - which will result in fail like below

getattr(some_module_name, 'MyClass') --> which will fail if you have replaced MyClass by ReplaceClass !