runtime-final

Declare final Python classes and methods at runtime.

This module provides a decorator based interface to declare final classes and methods. This module is inspired by and is compatible with typing.final. See PEP-591 for more details on this topic.

Installation

Python 3.6 or higher is required.

You can simply install this module from pip.

python -m pip install runtime-final

Usage

The main component of this module is the final decorator that can be used to decorate classes and methods inside a class. As such:

• Classes decorated with @final cannot be subclassed.
• Methods decorated with @final cannot be overriden in subclasses.

For example with classes:

from runtime_final import final

@final
class Foo:
    ...

class Bar(Foo):  # Raises RuntimeError
    ...

And with methods:

from runtime_final import final

class User:
    @final
    def edit(self):
        ...

class AnotherUser(User):
    def edit(self):  # Raises RuntimeError
        ...

Documentation

For more details, see the documentation