Before we run our application for the first time, we need to add the application's entry point. The entry point is the first code that will be run when our application is executed.
We want to give the users of our application the best user experience possible, so the first features that we need to add are the ability to receive and parse command line arguments, perform argument validation, set arguments when needed, and, last but not least, show an organized and informative help system so the users can see which arguments can be used and how to use the application.
Sounds like tedious work, right?
Luckily, Python has batteries included and the standard library contains a great module that allows ...
