import inspect
import catalogue
from typing import Type, Optional, Union, TYPE_CHECKING
if TYPE_CHECKING:
from scrubadub.post_processors import PostProcessor
post_processor_catalogue = catalogue.create('scrubadub', 'post_processors', entry_points=True)
[docs]def register_post_processor(post_processor: Type['PostProcessor'], autoload: Optional[bool] = None,
index: Optional[int] = None) -> None:
"""Register a PostProcessor for use with the ``Scrubber`` class.
You can use ``register_post_processor(NewPostProcessor)`` after your post-processor definition to automatically
register it with the ``Scrubber`` class so that it can be used to process Filth.
The argument ``autoload`` sets if a new ``Scrubber()`` instance should load this ``PostProcessor`` by default.
:param post_processor: The ``PostProcessor`` to register with the scrubadub post-processor configuration.
:type post_processor: PostProcessor class
:param autoload: Whether to automatically load this ``Detector`` on ``Scrubber`` initialisation.
:type autoload: bool
:param index: The location/index in which this ``PostProcessor`` should be added.
:type index: int
"""
if not inspect.isclass(post_processor):
raise ValueError("post_processor should be a class, not an instance.")
if autoload is not None:
post_processor.autoload = autoload
if index is not None:
post_processor.index = index
post_processor_catalogue.register(post_processor.name, func=post_processor)
[docs]def remove_post_processor(post_processor: Union[Type['PostProcessor'], str]) -> None:
"""Remove an already registered post-processor.
:param post_processor: The ``PostProcessor`` to register with the scrubadub post-processor configuration.
:type post_processor: Union[Type['PostProcessor'], str]
"""
if isinstance(post_processor, str):
if post_processor in post_processor_catalogue:
catalogue._remove((*post_processor_catalogue.namespace, post_processor))
elif inspect.isclass(post_processor):
if post_processor.name in post_processor_catalogue:
catalogue._remove((*post_processor_catalogue.namespace, post_processor.name))
else:
raise ValueError("post-processor should be a class (not an instance) or a string.")