command_context.py
| 817 B | Satir:
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| py
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from collections.abc import Generator from contextlib import AbstractContextManager, ExitStack, contextmanager from typing import TypeVar _T = TypeVar("_T", covariant=True) class CommandContextMixIn: def __init__(self) -> None: super().__init__() self._in_main_context = False self._main_context = ExitStack() @contextmanager def main_context(self) -> Generator[None, None, None]: assert not self._in_main_context self._in_main_context = True try: with self._main_context: yield finally: self._in_main_context = False def enter_context(self, context_provider: AbstractContextManager[_T]) -> _T: assert self._in_main_context return self._main_context.enter_context(context_provider)
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