Tenacity is a powerful, Apache 2.0-licensed library that simplifies adding retry behavior to Python functions, methods, or any callable. It’s a modern alternative to retrying and provides fine-grained control over retry policies, especially for HTTP clients, database connectors, and API wrappers. Core Features 1. Decorator-Based Retries ( @retry ) Apply retry logic with minimal boilerplate.
from tenacity import retry @retry def unstable_http_call(): # Automatically retries on any exception ... Retry only on specific exceptions (or retry except some). tenacity client
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. Tenacity is a powerful, Apache 2
@retry(retry=retry_if_result(lambda x: x is None)) def get_user(): ... Control delays between retries: Decorator-Based Retries ( @retry ) Apply retry logic