chore: import upstream snapshot with attribution

servers/fastapi/utils/async_iterator.py

@@ -0,0 +1,16 @@
+import asyncio
+from typing import AsyncGenerator, Callable, Iterator, TypeVar
+
+T = TypeVar("T")
+
+
+def iterator_to_async(
+    func: Callable[..., Iterator[T]],
+) -> Callable[..., AsyncGenerator[T, None]]:
+    async def wrapper(*args, **kwargs) -> AsyncGenerator[T, None]:
+        iterator = func(*args, **kwargs)
+        for item in iterator:
+            yield item
+            await asyncio.sleep(0)
+
+    return wrapper