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66 lines
1.7 KiB
66 lines
1.7 KiB
2 years ago
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import functools
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import sys
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import typing
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import warnings
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import anyio
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if sys.version_info >= (3, 10): # pragma: no cover
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from typing import ParamSpec
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else: # pragma: no cover
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from typing_extensions import ParamSpec
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T = typing.TypeVar("T")
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P = ParamSpec("P")
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async def run_until_first_complete(*args: typing.Tuple[typing.Callable, dict]) -> None:
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warnings.warn(
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"run_until_first_complete is deprecated "
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"and will be removed in a future version.",
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DeprecationWarning,
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)
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async with anyio.create_task_group() as task_group:
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async def run(func: typing.Callable[[], typing.Coroutine]) -> None:
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await func()
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task_group.cancel_scope.cancel()
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for func, kwargs in args:
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task_group.start_soon(run, functools.partial(func, **kwargs))
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async def run_in_threadpool(
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func: typing.Callable[P, T], *args: P.args, **kwargs: P.kwargs
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) -> T:
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if kwargs: # pragma: no cover
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# run_sync doesn't accept 'kwargs', so bind them in here
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func = functools.partial(func, **kwargs)
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return await anyio.to_thread.run_sync(func, *args)
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class _StopIteration(Exception):
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pass
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def _next(iterator: typing.Iterator[T]) -> T:
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# We can't raise `StopIteration` from within the threadpool iterator
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# and catch it outside that context, so we coerce them into a different
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# exception type.
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try:
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return next(iterator)
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except StopIteration:
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raise _StopIteration
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async def iterate_in_threadpool(
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iterator: typing.Iterator[T],
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) -> typing.AsyncIterator[T]:
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while True:
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try:
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yield await anyio.to_thread.run_sync(_next, iterator)
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except _StopIteration:
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break
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