py_anext#
- langchain_core.utils.aiter.py_anext(iterator: ~typing.AsyncIterator[~langchain_core.utils.aiter.T], default: ~langchain_core.utils.aiter.T | ~typing.Any = <object object>) Awaitable[T | None | Any] [source]#
Pure-Python implementation of anext() for testing purposes.
Closely matches the builtin anext() C implementation. Can be used to compare the built-in implementation of the inner coroutines machinery to C-implementation of __anext__() and send() or throw() on the returned generator.
- Parameters:
iterator (AsyncIterator[T]) – The async iterator to advance.
default (T | Any) – The value to return if the iterator is exhausted. If not provided, a StopAsyncIteration exception is raised.
- Returns:
- The next value from the iterator, or the default value
if the iterator is exhausted.
- Raises:
TypeError – If the iterator is not an async iterator.
- Return type:
Awaitable[T | None | Any]