registrable 0.0.4

Python module for registering and instantiating classes by name. Based on the implementation from AllenNLP.

python-registrable

Python module for registering and instantiating classes by name. Based on the implementation from AllenNLP.

Installing

The quickest way to install is through PyPI.

pip install registrable

Usage

from registrable import Registrable

# Create a base class that inherits from `Registrable`.
class MyBaseClass(Registrable):
    def do_something(self):
        raise NotImplementedError


# Now register subclass implementations of your base class.
@MyBaseClass.register("first_implementation")
class FirstImplementation(MyBaseClass):
    def do_something(self):
        return 1


# You can access an implementation by calling `.by_name()` on the base class.
subclass = MyBaseClass.by_name("first_implementation")
instance = subclass()
assert instance.do_something() == 1