Override module method where from...import is used

I have a problem overriding the method where from...import statement is used. Some example to illustrate the problem: # a.py module def print_message(msg): print(msg) # b.py module from a import print_message def execute(): print_message("Hello") # c.py module which will be executed import b b.execute() I'd like to override print_message(msg) method without changing code in a or b module. I tried

[BigFatCat]

importしたfuncionをモンキーパッチする方法