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41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
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# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
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# Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
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"""Callback actions for various options."""
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import abc
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import argparse
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from typing import Any, Optional, Sequence, Union
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class _CallbackAction(argparse.Action):
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"""Custom callback action."""
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@abc.abstractmethod
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def __call__(
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self,
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parser: argparse.ArgumentParser,
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namespace: argparse.Namespace,
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values: Union[str, Sequence[Any], None],
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option_string: Optional[str] = None,
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) -> None:
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raise NotImplementedError
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class _DoNothingAction(_CallbackAction):
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"""Action that just passes.
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This action is used to allow pre-processing of certain options
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without erroring when they are then processed again by argparse.
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"""
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def __call__(
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self,
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parser: argparse.ArgumentParser,
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namespace: argparse.Namespace,
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values: Union[str, Sequence[Any], None],
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option_string: Optional[str] = None,
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) -> None:
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return None
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