firestar5683
52 lines
1.5 KiB
Python
52 lines
1.5 KiB
Python
from asyncio import Future
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from typing import Callable, Optional, TypeVar, Union
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from reactivex import Observable, abc, from_future
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from reactivex.disposable import CompositeDisposable
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from reactivex.internal import noop
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_T = TypeVar("_T")
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def take_until_(
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other: Union[Observable[_T], "Future[_T]"]
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) -> Callable[[Observable[_T]], Observable[_T]]:
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if isinstance(other, Future):
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obs: Observable[_T] = from_future(other)
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else:
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obs = other
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def take_until(source: Observable[_T]) -> Observable[_T]:
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"""Returns the values from the source observable sequence until
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the other observable sequence produces a value.
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Args:
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source: The source observable sequence.
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Returns:
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An observable sequence containing the elements of the source
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sequence up to the point the other sequence interrupted
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further propagation.
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"""
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def subscribe(
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observer: abc.ObserverBase[_T],
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scheduler: Optional[abc.SchedulerBase] = None,
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) -> abc.DisposableBase:
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def on_completed(_: _T) -> None:
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observer.on_completed()
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return CompositeDisposable(
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source.subscribe(observer, scheduler=scheduler),
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obs.subscribe(
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on_completed, observer.on_error, noop, scheduler=scheduler
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),
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)
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return Observable(subscribe)
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return take_until
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__all__ = ["take_until_"]
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