Enum Algebraic Data Types (ADTs) for Python.

Run the following command to install the Python package on Python 3.8 or later:

pip install enum-adt

Or you can simply copy the enum_adt.py file anywhere in your project.

from enum_adt import ADT

class MyEnum(ADT):
    class Foo: ...

    class Bar:
        name: str

foo = MyEnum.Foo()
bar = MyEnum.Bar("bar")
assert isinstance(foo, MyEnum)
assert isinstance(bar, MyEnum)

Alternatively, you can use metaclass:

from enum_adt import ADTMeta

class MyEnum(metaclass=ADTMeta):
    class Foo: ...

    class Bar:
        name: str

Each internal class will be created as a dataclass with the same attributes. You can customize the dataclass by passing arguments to the class:

All enum variants get the same arguments.

from enum_adt import ADT

class MyEnum(ADT, frozen=True, kw_only=True):
    class Foo: ...

    class Bar:
        name: str

This project is licensed under the MIT License. See the LICENSE file for more details.