Catch undefined module function calls and process it within the module

My my_module has just 1 function called f.

So

import my_module
my_module.f()

is a valid code.

But I want to wrap undefined function calls the way my_module.f() is called instead. And I want to do it by default without any exta-code outside the module, i.e. I want to put all the wrapping code inside my_module. So when I do

import my_module
my_module.this_function_is_not_defined()

the python will not raise an exception, but call my_module.f() instead.

It’s kind of overriding __getattr__ of the class or __getitem__ of the dict.

Is it possible to do it within the module?

Kind of

globals().__getitem__ = lambda self, x: self.__getitem__ if self.__contains__(x) else f

>Solution :

You can set __getattr__ on a module just like on a class. Assuming that we have the following in my_module.py:

def f():
    print('hello world')

def __getattr__(attr):
    return f

We can use it like this:

>>> import my_module
>>> my_module.bar()
hello world
>>> my_module.this_function_is_not_defined()
hello world

Etc.