Modular Programming with Python

Initializing a package

To initialize a package, you place the Python code inside the package's __init__.py file. This code is then executed when the package is imported. For example, imagine that you have a package named test_package, which contains an __init__.py file and one module named test_module.py:

You can place whatever code you like inside the __init__.py file, and when the package (or a module within the package) is imported for the first time, that code will be executed.

You might be wondering why you might want to do this. Initializing a module makes sense as a module contains various functions that might need to be initialized before ...