Python accessing modules from package that is distributed over different directories

Question

I have a question regarding one single module that is distributed over multiple directories.

Let\'s say I have these two file and directories:

~/lib/         


        

Answer 1

This is an adaptation of an answer to a similar question.

Following up on @Gary's answer, the PEP 420 page says to use the following code on shared __init__.py packages.

__init__.py:

from pkgutil import extend_path
__path__ = extend_path(__path__, __name__)

This code should be placed inside the xxx directory's __init__.py. See the *s below

someroot/
├── graphics
│   └── python
│       └── xxx
│           ├── ****__init__.py****
│           └── misc
│               ├── __init__.py
│               ├── module3.py
│               └── module4.py
└── lib
    └── python
        └── xxx
            ├── ****__init__.py****
            └── util
                ├── __init__.py
                ├── module1.py
                └── module2.py

Some setup.sh file to add to the Python Path:

libPath=someroot/lib/python/
graphicsPath=someroot/graphics/python/
export PYTHONPATH=$PYTHONPATH:$libPath:$graphicsPath

Python test code (tested on Python versions 2.7.14 and 3.6.4 using pyenv):

import xxx.util.module1
import xxx.misc.module3 # No errors