Factory+Registry pattern for Python classes.
Project description
ClassRegistry
At the intersection of the Registry and Factory patterns lies the ClassRegistry:
Define global factories that generate new class instances based on configurable keys.
Seamlessly create powerful service registries.
Integrate with setuptools’s entry_points system to make your registries infinitely extensible by 3rd-party libraries!
And more!
Getting Started
Create a registry using the class_registry.ClassRegistry class, then decorate any classes that you wish to register with its register method:
from class_registry import ClassRegistry
pokedex = ClassRegistry()
@pokedex.register('fire')
class Charizard(Pokemon):
...
@pokedex.register('grass')
class Bulbasaur(Pokemon):
...
@pokedex.register('water')
class Squirtle(Pokemon):
...
To create a class instance from a registry, use the subscript operator:
# Charizard, I choose you!
fighter1 = pokedex['fire']
# CHARIZARD fainted!
# How come my rival always picks the type that my pokémon is weak against??
fighter2 = pokedex['grass']
Advanced Usage
There’s a whole lot more you can do with ClassRegistry, including:
Provide args and kwargs to new class instances.
Automatically register non-abstract classes.
Integrate with setuptools’s entry_points system so that 3rd-party libraries can add their own classes to your registries.
Wrap your registry in an instance cache to create a service registry.
And more!
For more advanced usage, check out the documentation on RTD!
Requirements
ClassRegistry is compatible with Python versions 3.6, 3.5 and 2.7.
Installation
Install the latest stable version via pip:
pip install class-registry
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