How can I access the current executing module or class name in Python?

Question

I would like to be able to dynamically retrieve the current executing module or class name from within an imported module. Here is some code:

foo.py:

Answer 1

To obtain a reference to the "__main__" module when in another:

import sys
sys.modules['__main__']

To then obtain the module's file path, which includes its name:

sys.modules['__main__'].__file__

If within the "__main__" module, simply use: __file__

To obtain just the file name from the file path:

import os
os.path.basename(file_path)

To separate the file name from its extension:

file_name.split(".")[0]

To obtain the name of a class instance:

instance.__class__.__name__

To obtain the name of a class:

class.__name__