What Python modules would you use to write a configuration parser?

Modules commonly used for writing configuration parsers in Python include:

• configparser — for reading and writing INI files.
• json — for working with JSON format configurations.
• yaml (via the PyYAML library) — for parsing YAML files.
• argparse — for handling command-line arguments if the configuration is passed through parameters.

Example of a simple INI configuration parser:

import configparser

config = configparser.ConfigParser()
config.read('settings.ini')

print(config['DEFAULT']['Server'])

The choice of module depends on the format of the configuration file.