Introduction to the Python Polylith Project
Overview
The Python Polylith project is an innovative initiative that brings the Polylith Architecture, originally made for Clojure, to the Python programming language. This architecture focuses on maintaining simplicity, maintainability, scalability, and testability in constructing backend systems. The project aims to facilitate the development of microservices and applications within a Monorepo and encourage code sharing among services.
What is Polylith?
Polylith is a unique architectural approach that emphasizes a components-first methodology. It is conceptualized around building blocks, akin to LEGO bricks, where all code exists in a Monorepo for easy reuse. This technique strategically separates Python code, or "bricks," from the infrastructure and the processes involved in artifacts' creation.
Primary Use Cases
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Microservices and Applications: The core functionality of Python Polylith is to allow one or several microservices (or apps) to coexist in a Monorepo, thus promoting shared code across different services.
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Libraries: While not the principal focus, Polylith also supports constructing libraries for PyPI publication. More information on library packaging can be found in the dedicated Packaging & Deploying documentation.
Documentation and Resources
For comprehensive instructions on installation, setup, usage, and practical examples, users can refer to the Python-specific documentation.
Python Monorepos with Polylith
Polylith in Python is compatible with several package managers, including Poetry, Hatch, PDM, Rye, uv, and Pantsbuild. This flexibility is made possible through various tools provided by the project:
- Poetry Plugin: Enhances tooling support in Poetry.
- CLI (Command-line Interface): Offers tooling aid for several package and dependency managers like Hatch, PDM, Rye, and uv.
- Hatch Build Hook: Provides build-specific support and integrates with uv, Rye, and Pantsbuild.
- PDM Build Hooks: One for projects and another for the workspace to help manage the code organization common in Polylith setups.
Examples and Production Systems
The project includes various example repositories showcasing Polylith's practical application with different setups:
These examples illustrate code-sharing techniques across various project types and best practices for integrating development tools like mypy and venv.
Additional Resources
Several multimedia resources such as videos, talks, podcasts, and articles are available to provide deeper insights into the Polylith architecture and its benefits. These resources discuss using Python with Polylith, showcasing the developer experience, and explore the architecture's role in modern software development.
Through its innovative architecture and comprehensive tooling, the Python Polylith project facilitates the development of scalable and maintainable Python applications and microservices, making it a notable choice for developers looking to optimize their backend systems.