Create skeleton on app which allows people to easily extend it.

[JustCallMeRay]

• Write a basic entrypoint into the app, this should be a function called main.
• Check for command line arguments and call the correct functions (avoid using a switch/series of if statements if possible as this is not easily extendable, an ideal solution would have no run time dependencies)
• Print a help message to the console if the command line argument does not match any of the known features, it should detail all the possible arguments and any possible values those arguments need.
• Help message should also be shown if the -h or --Help arguments are given
• Write a unit test to check that a help message is shown.
• Write a unit test and mock module to check a module can be added without changing the "main" function/file.
• Change any existing code to function with the new entry point.

[GeeCastro]

Hi Ray, would this be something like click?

import click

@click.command()
@click.option('--count', default=1, help='Number of greetings.')
@click.option('--name', prompt='Your name',
              help='The person to greet.')
def hello(count, name):
    """Simple program that greets NAME for a total of COUNT times."""
    for x in range(count):
        click.echo(f"Hello {name}!")

if __name__ == '__main__':
    hello()