The PY file format means using Python code as the configuration file as well as the language to implement the application. We will have a configuration file that's simply a module; the configuration is written in the Python syntax. This removes the need to parse the module.
Using Python gives us a number of design considerations. We have two overall strategies to use Python as the configuration file:
We can design a top-level script file that looks like the following code:
from simulator import ...