An async-first Python library for structuring code around CQRS (Commands, Queries, Events) with pluggable dependency injection.

The full guide lives at https://python-cq.remimd.dev. Start there: it covers installation, routing (messages, buses, middlewares, command pipelines, custom DI), and queuing.

Requires Python 3.12 or higher.

pip install "python-cq[injection]"

The [injection] extra installs python-injection as the default DI backend (recommended). To bring your own DI framework, install python-cq without the extra and see the Custom DI adapter guide.