I want to find out where the module is in path

modulename.__file__ tells you the path where the module (.pyc) is loaded.

import a_module
print a_module.__file__

#or
import os
path = os.path.abspath(amodule.__file__)

If you want to know that the directory of the module has changed, you can write as follows.

import os
path = os.path.dirname(amodule.__file__)

inspection provides information on module or class, methods, functions, tracacks, and

Representatively, Examples include member variables/functions in class, parameter format of functions, source code of methods, and so on.

import os
import inspect
print(inspect.getfile(os)) #'/usr/lib64/python2.7/os.pyc'
print(inspect.getfile(inspect)) #'/usr/lib64/python2.7/inspect.pyc'
os.path.dirname(inspect.getfile(inspect)) #'/usr/lib64/python2.7'