Source code for viam.streams

import sys

if sys.version_info >= (3, 9):
    from collections.abc import AsyncIterator
else:
    from typing import AsyncIterator

from typing import Protocol, TypeVar

StreamType = TypeVar("StreamType", covariant=True)


[docs]class Stream(Protocol[StreamType]):
[docs] async def next(self) -> StreamType: ...
[docs] def __aiter__(self) -> AsyncIterator: return self
[docs] async def __anext__(self) -> StreamType: return await self.next()
[docs]class StreamReader(Protocol[StreamType]):
[docs] async def read(self) -> StreamType: ...
[docs]class StreamSource(Protocol[StreamType]):
[docs] async def stream(self) -> Stream[StreamType]: ...
[docs]class StreamWithIterator(Stream[StreamType]): _stream: AsyncIterator[StreamType] def __init__(self, stream: AsyncIterator[StreamType]): self._stream = stream
[docs] async def next(self) -> StreamType: return await self._stream.__anext__()
[docs] def __aiter__(self): return self._stream
[docs] async def __anext__(self) -> StreamType: return await self._stream.__anext__()