Unravelling `Async for` Loops

# · ✸ 50 · 💬 39 · 9 days ago · snarky.ca · genericlemon24
Turned out there's wasn't a key reason to it, and so for Python 3.10.0rc2, aiter() was changed to only require the returned async iterator from aiter to define anext , thus operating more like iter(). If the async iterator does not define an awaitable ` anext `, raise `TypeError`. Type(iterator) try: anext = mro getattr(iterator type, " anext ") except AttributeError: raise TypeError(f" is not an async iterator") if not inspect. Iscoroutinefunction( anext ): raise TypeError(f" is not an async iterator") return iterator anext(). Async def anext(iterator: AsyncIterator[Any], default: Any = NOTHING, /) -> Any: ""Return the next item from the async iterator by calling anext. Type(iterator) try: anext = mro getattr(iterator type, " anext ") except AttributeError: raise TypeError(f" is not an async iterator") try: return await anext except StopAsyncIteration: if default is not NOTHING: return default else: raise The semantics. Unravelling async for follows the format of for loops very closely.
Unravelling `Async for` Loops



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