python-seedwork
DDD and Hexagonal Architecture building blocks for Python.
Goals
- Unify design patterns. Provide a shared vocabulary — entities, aggregates, value objects, domain events, CQRS buses — so every bounded context starts from the same foundation.
- Keep domain logic pure. The domain layer has zero framework or infrastructure imports. Business rules live in the domain; everything else lives in infrastructure.
- Clear layer boundaries. Protocols define contracts; implementations satisfy them structurally. The dependency direction is enforced: domain ← application ← infrastructure.
Components
| Layer | Package | Components |
|---|---|---|
| Domain | seedwork.domain |
Entity, AggregateRoot, ValueObject, DomainEvent, DomainEventRecord, DomainError, Repository, UnitOfWork |
| Application | seedwork.application |
Command, Query[TResult], CommandHandler, QueryHandler, CommandBus, QueryBus, Result, DomainEventBusPublisher, DomainEventBusSubscriber, DomainEventBus, DomainEventHandler, BaseIntegrationEvent[TPayload], IntegrationEvent[TPayload], IntegrationEventPublisher, IntegrationEventHandler, BackgroundTask[TPayload], TaskScheduler |
| Infrastructure | seedwork.infrastructure |
RegistryCommandBus, RegistryQueryBus, TransactionalCommandBus, DomainEventCoordinatorCommandBus, CommandBusBuilder, QueryBusBuilder, DeferredDomainEventBus, DomainEventPublishingRepository, InMemoryRepository |
All components are also re-exported from the top-level seedwork package.
Installation
pip install python-seedwork
Requires Python 3.12+. Ships a py.typed marker (PEP 561) — mypy and pyright pick up the inline types automatically.
Documentation
Comprehensive guides are available in the docs/ directory:
A complete Bank Account example demonstrates all patterns end-to-end.
Requirements
Python 3.12+, uv
Built With
- Python 3.12+
- uv — dependency management and packaging
- Ruff — linting and formatting
- Pyright — strict static type checking
- pytest — testing with coverage gate
- python-semantic-release — automated versioning and changelog
Development
git clone https://github.com/aseguragonzalez/python-seedwork.git
cd python-seedwork
make install
| Command | Description |
|---|---|
make check |
Lint, typecheck, and tests (what CI runs) |
make lint |
Run ruff linter |
make format |
Format and auto-fix with ruff |
make typecheck |
Run pyright |
make test |
Run tests with coverage (90% gate) |
make test-no-cov |
Run tests without coverage |
make clean |
Remove build artifacts and caches |
Contributing
This project follows the Conventional Commits specification. The commit-msg pre-commit hook enforces the format; python-semantic-release derives versions and the changelog from commit prefixes automatically.
References
This package draws on the following literature and on the experience of building solid, scalable, and maintainable systems in different stacks (PHP, C#, Python, TypeScript).
- Eric Evans, Domain-Driven Design: Tackling Complexity in the Heart of Software 1
- Vaughn Vernon, Implementing Domain-Driven Design 2
- Robert C. Martin, Clean Architecture: A Craftsman's Guide to Software Structure and Design 3
- .NET Microservices: Architecture for Containerized .NET Applications 4
- Architecture Patterns with Python, Harry Percival & Bob Gregory 5
License
1 maintainer
Metadata
1 maintainer
Release files for python-seedwork 1.1.2
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| python_seedwork-1.1.2.tar.gz | 157.9 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| python_seedwork-1.1.2-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 180.2 kB
Release files / python_seedwork-1.1.2.tar.gz
| Download URL | python_seedwork-1.1.2.tar.gz |
|---|---|
| Size | 157.9 kB |
| Tags | Source |
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| Tags | Python 3 |
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| Uploaded via |
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