Getting corresponding module from function

Question

I want to modify a module xyz and its functions like that:

def modify(fun):     modulename = fun.__module__ # this is string. ok, but not enough  import xyz modify(xzy.test) 

My problem is how to access the namespace of xzy inside modify. Sometimes

globals()[fun.__module__] 

works. But then I get problems if the definition modify is in a different file than the rest of the code.

Answer 1

Use the inspect module:

import inspect  def modify(fun):     module = inspect.getmodule(fun) 

This is the same as polling the module from sys.modules using fun.__module__. Although getmodule tries harder even if fun does not have a __module__ attribute.

Answer 2

You want to get the module object from its name? Look it up in the sys.modules dictionary that contains all currently loaded modules:

import sys  def modify(func):     module = sys.modules[func.__module__]