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# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from types import TracebackType
from typing import Callable, Generator, Iterable, Optional, Type, TypeVar
RetT = TypeVar("RetT")
ArgT = TypeVar("ArgT")
class DummyPool:
"""
Synchronous dummy `multiprocessing.Pool` analogue.
"""
def __init__(self, processes: Optional[int] = None) -> None:
pass
def imap_unordered(
self,
func: Callable[[ArgT], RetT],
iterable: Iterable[ArgT],
chunksize: Optional[int] = None,
) -> Generator[RetT, None, None]:
for args in iterable:
yield func(args)
def __enter__(self) -> "DummyPool":
return self
def __exit__(
self,
exc_type: Optional[Type[Exception]],
exc: Optional[Exception],
tb: Optional[TracebackType],
) -> None:
pass
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