Created
September 10, 2024 20:42
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Retry a coroutine function multiple times with a delay.
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| import asyncio | |
| import logging | |
| from typing import Any, Awaitable, Callable, TypeVar | |
| logger = logging.getLogger(__name__) | |
| # Define a TypeVar to capture the function's return type | |
| R = TypeVar("R") | |
| async def retry( | |
| func: Callable[..., Awaitable[R]], | |
| *args: Any, | |
| retry_attempts: int = 3, | |
| retry_delay: float = 2.0, | |
| **kwargs: Any, | |
| ) -> R: | |
| """ | |
| Retry a coroutine function multiple times with a delay. | |
| Args: | |
| func: The coroutine function to retry. | |
| retry_attempts (int): Number of times to retry the function. | |
| retry_delay (float): Delay between retries in seconds. | |
| Returns: | |
| Result of the function, if successful. | |
| Raises: | |
| Exception: Re-raises the last caught exception if retries fail. | |
| """ | |
| attempt = 0 | |
| while attempt < retry_attempts: | |
| try: | |
| return await func(*args, **kwargs) | |
| except Exception as e: | |
| attempt += 1 | |
| if attempt >= retry_attempts: | |
| raise e | |
| logger.warning( | |
| "Retry attempt %d/%d failed: %s. Retrying in %.1f seconds...", | |
| attempt, | |
| retry_attempts, | |
| str(e), | |
| retry_delay, | |
| ) | |
| await asyncio.sleep(retry_delay) | |
| # Add a return statement at the end to satisfy mypy (though this should never be reached) | |
| assert ( | |
| False | |
| ), "Retry function should have either returned a value or raised an exception" |
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