monkey patching in python

1from SomeOtherProduct.SomeModule import SomeClass
2
3def speak(self):
4    return "ook ook eee eee eee!"
5
6SomeClass.speak = speak

1In Python, the term monkey patch refers to dynamic (or run-time) modifications of a class or module. In Python, we can actually change the behavior of code at run-time.
2filter_none
3
4# monk.py 
5class A: 
6     def func(self): 
7          print ("func() is being called") 
8
9We use above module (monk) in below code and change behavior of func() at run-time by assigning different value.
10filter_none
11
12import monk 
13def monkey_f(self): 
14     print ("monkey_f() is being called") 
15# replacing address of "func" with "monkey_f" 
16monk.A.func = monkey_f 
17obj = monk.A() 
18# calling function "func" whose address got replaced 
19# with function "monkey_f()" 
20obj.func() 
21