phx-class-registry
Factory+Registry pattern for Python classes
Decision gist · record as of 2026-08-14
Yes. The package is actively maintained, has zero security vulnerabilities, imposes no dependency overhead, and cleanly solves a common architectural problem. It is worth installing if you need to implement registry or factory patterns in your application. The MIT license removes any legal friction. The only constraint is the Python 3.12 or later requirement.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.12 or later.
- Low install friction with no runtime dependencies.
- Active maintenance with a recent release 94 days ago and ongoing repository activity.
License · maintenance · safety
MIT (permissive) — MIT license permits unrestricted use, modification, and distribution with minimal restrictions—suitable for both open-source and proprietary projects.
last release 2026-05-12 (94 days) · last repo commit 2026-08-14 · 57 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 145,901 downloads/mo, #11,114 on PyPI
Alternatives
Verify before relying
pip install phx-class-registry
from phx_class_registry import ClassRegistry
pokedex = ClassRegistry()
@pokedex.register('fire')
class Charizard:
pass
fighter = pokedex['fire']- Whether the package supports type hints for registry instances in practice across all supported Python versions.
- Performance characteristics when registries contain hundreds or thousands of registered classes.
- Exact behavior and compatibility of entry_points integration with modern setuptools versions.
What it is and what it does
phx-class-registry provides a lightweight implementation of the Registry and Factory design patterns for Python. It lets you create a registry object, decorate classes to register them under string keys, and then instantiate those classes by key lookup. The pattern is useful for plugin systems, service locators, and any scenario where you need to dynamically select and instantiate classes at runtime based on configuration or user input.
The package supports advanced features including passing constructor arguments, automatic registration of non-abstract classes, and integration with setuptools entry points to allow third-party libraries to extend your registries. With zero runtime dependencies and active maintenance, it's a straightforward tool for implementing these patterns without external complexity.
Use it for
- Build a plugin system where third-party packages register handlers via entry points.
- Create a service registry that maps service names to their implementation classes.
- Implement a factory for different data processor classes selected by file type or format.
- Define a registry of database drivers or connection strategies keyed by database name.
- Build a command dispatcher that maps command strings to handler classes.
- Create a polymorphic object instantiation system for configuration-driven class selection.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
The package is actively maintained, has zero security vulnerabilities, imposes no dependency overhead, and cleanly solves a common architectural problem. It is worth installing if you need to implement registry or factory patterns in your application. The MIT license removes any legal friction. The only constraint is the Python 3.12 or later requirement.
Install
phx-class-registry on PyPI
Before you install
Low install friction with no runtime dependencies. Active maintenance with a recent release 94 days ago and ongoing repository activity. Requires Python 3.12 or later.
Requires Python 3.12 or later.
License in practice
MIT license permits unrestricted use, modification, and distribution with minimal restrictions—suitable for both open-source and proprietary projects.
Quickstart
pip install phx-class-registry
from phx_class_registry import ClassRegistry
pokedex = ClassRegistry()
@pokedex.register('fire')
class Charizard:
pass
fighter = pokedex['fire']Verify before relying
- Whether the package supports type hints for registry instances in practice across all supported Python versions.
- Performance characteristics when registries contain hundreds or thousands of registered classes.
- Exact behavior and compatibility of entry_points integration with modern setuptools versions.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.12 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 94 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 145,901 / month, #11,114 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersTopic :: Software Development :: Libraries :: Python Modules |
Evidence: phx_class_registry-5.2.2-py3-none-any.whl
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