Modules have a magic attribute called __path__. Whenever you'r | Python etc

Modules have a magic attribute called __path__. Whenever you're doing subpackage imports, __path__ is being searched for
that submodule.

__path__ looks like a list of path strings, e.g ["foo/bar", "/path/to/location"].

So if you do from foo import bar, or import foo.bar, foo's __path__ is being searched for bar. And if found - loaded.

You can play around with __path__ to test it out.

Create simple Python module anywhere on your system:


$ tree
.
└── foo.py

$ cat foo.py
def hello():
return "hello world"

Then, run the interpreter there and do the following:
python
>>> import os
>>> os.__path__ = ["."]
>>> from os.foo import hello
>>> hello()
'hello world'

As you can see, foo is now available under os:
python
>>> os.foo