Tenacity Client [verified] -

from tenacity import retry @retry def never_succeed(): raise Exception("Always fails") Tenacity is the go-to retry library for Python clients. Its expressive API, extensive wait strategies, and async support make it suitable for everything from simple scripts to production microservices. It replaces the now-deprecated retrying library and offers more control than a manual while loop. ✅ Recommendation: Use Tenacity for any client that communicates over unreliable networks or resources. Pair with circuit breakers (e.g., pybreaker ) for advanced resilience patterns.

@retry(retry=retry_if_exception_type(requests.RequestException)) def fetch_data(): ... Retry based on return value or exception message. tenacity client

retryer = Retrying(stop=stop_after_attempt(3)) with retryer: unreliable_operation() Built-in logging of retry events (supports custom logger). 11. Integration with asyncio , Tornado , gevent Event-loop aware waiting. Example: Resilient HTTP Client from tenacity import ( retry, stop_after_attempt, wait_exponential, retry_if_exception_type, before_sleep_log ) import requests import logging logging.basicConfig(level=logging.INFO) from tenacity import retry @retry def never_succeed(): raise

@retry(retry=retry_if_result(lambda x: x is None)) def get_user(): ... Control delays between retries: ✅ Recommendation: Use Tenacity for any client that