Serialization, Config & Data Interchange

Config: TOML, YAML, INI & .env

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The Config Format Landscape

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IN THIS LESSON

YOU’RE LEARNING TO

↗read and write TOML configuration using the stdlib tomllib (Python 3.11+)

↗parse YAML configuration files using pyyaml safely

↗use configparser to read and write INI-style configuration

↗load .env files with python-dotenv and access values via os.environ

↗implement a layered config system where env vars override file values which override defaults

↗choose the right config format based on use case