はてなブックマーク

Zero dependencies — pure Python, stdlib only Four APIs — decorator (@on_exception, @on_predicate), functional (retry()), context manager (Retrying), callable (RetryingCaller / AsyncRetryingCaller) Async native — same API works for async def functions Full type hints — validated with mypy, py.typed included Global toggle — backon.disable() / backon.enable() for testing Custom sleep — inject your ow