Hands-On Reactive Programming with Python

Parsing the configuration file

Parsing the configuration file requires three distinct parts, as shown previously in the reactivity diagram for the application:

• Parsing the command-line arguments
• Reading the configuration file
• Parsing the configuration file and converting it to a Python object

Command-line arguments are retrieved with the argv driver of the cyclotron-std package, as already seen with the cyclotron echo example. The application accepts only one argument, named config. The Python standard library contains a module dedicated to the parsing of arguments: argparse. Moreover, the cyclotron-std package contains a helper to use the argparse module with an observable of arguments as an input. So, all these elements can be used as ...