Welcome to python modules

files as modules

Any loose file sitting on your current path is a python module:

python3 -m my_module

This has limitations. No ability to split your thoughts out and organize anything.

Directories as modules (and submodules)

Directories can be modules too.

python3 -m another_module

__init__.py and __main__.py are special:

• __init__.py runs when your module is imported the first time
• __main__.py runs when your module is invoked as main (with python3 -m)

Representative example

Just dig around. Invoking the module will use the hard-coded values in the function:

python3 -m representative_example

Getting silly with entrypoints

__main__.py doesnt' have to be your only entrypoint. Here, I've provided two more that allow user input in different ways:

# Prints help
python3 -m representative_example.cli --help

# Yells at you
python3 -m representative_example.cli

# Uses a default
python3 -m representative_example.cli -d1 22 

# Prints help
python3 -m representative_example.cli -d1 22 -d2 1.2

Or let it read a file:

python3 -m representative_example.file_io --json_file ./example_data.json

More representative example

first generate the example mat file:

python3 -m weee.gen_example

run like this:

python3 -m weee --mat_file ./testo.mat