mirror of
https://github.com/PiBrewing/craftbeerpi4.git
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57 lines
1.4 KiB
Python
57 lines
1.4 KiB
Python
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# Copyright 2018
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# Licensed under the MIT license
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from functools import wraps
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from typing import Any, Callable, Coroutine, Generator, TypeVar
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from typing_extensions import AsyncContextManager
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from .cursor import Cursor
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_T = TypeVar("_T")
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class Result(AsyncContextManager[_T], Coroutine[Any, Any, _T]):
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__slots__ = ("_coro", "_obj")
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def __init__(self, coro: Coroutine[Any, Any, _T]):
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self._coro = coro
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self._obj: _T
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def send(self, value) -> None:
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return self._coro.send(value)
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def throw(self, typ, val=None, tb=None) -> None:
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if val is None:
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return self._coro.throw(typ)
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if tb is None:
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return self._coro.throw(typ, val)
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return self._coro.throw(typ, val, tb)
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def close(self) -> None:
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return self._coro.close()
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def __await__(self) -> Generator[Any, None, _T]:
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return self._coro.__await__()
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async def __aenter__(self) -> _T:
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self._obj = await self._coro
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return self._obj
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async def __aexit__(self, exc_type, exc, tb) -> None:
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if isinstance(self._obj, Cursor):
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await self._obj.close()
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def contextmanager(
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method: Callable[..., Coroutine[Any, Any, _T]]
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) -> Callable[..., Result[_T]]:
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@wraps(method)
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def wrapper(self, *args, **kwargs) -> Result[_T]:
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return Result(method(self, *args, **kwargs))
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return wrapper
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