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pyo3/newsfragments/3661.changed.md

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The Iter(A)NextOutput types are now deprecated and __(a)next__ can directly return anything which can be converted into Python objects, i.e. awaitables do not need to be wrapped into IterANextOutput or Option any more. Option can still be used as well and returning None will trigger the fast path for __next__, stopping iteration without having to raise a StopIteration exception.