Fastapi Microservices Development

This is your FastAPI production microservices playbook. It covers the framework's dependency injection system, async/await patterns, REST API design with Pydantic validation, and service communication strategies. You'll find guidance on when to use async def versus regular def, how to structure stateless services with proper database separation, and API versioning approaches. The documentation includes concrete patterns for inter-service communication using httpx, event-driven architectures, and deployment considerations. If you're building Python microservices beyond simple CRUD and need to handle authentication, WebSockets, or service orchestration at scale, this gives you the architectural patterns and FastAPI-specific idioms to do it right.