Mastering Object-oriented Python

Creating a top-level main() function

In Chapter 13, Configuration Files and Persistence, we suggested two application configuration design patterns:

• The global property map: In the previous examples, we implemented the global property map with a Namespace object created by ArgumentParser.
• Object construction: The idea behind object construction was to build the required object instances from the configuration parameters, effectively demoting the global property map to a local property map inside the main() function and not saving the properties.

What we showed you in the previous section was the use of a local Namespace object to collect all of the parameters. From this, we can build the necessary application objects that will do the real work of ...