FastAPI
FastAPI is a modern, high-performance web framework for building APIs with Python 3.7+, based on standard Python type hints. It is designed for fast development and high performance, automatically generating interactive API documentation (OpenAPI and JSON Schema) and supporting asynchronous programming. It is widely used for creating RESTful APIs, microservices, and backend systems.
Developers should learn FastAPI when building high-performance APIs that require automatic documentation, validation, and serialization, especially in Python-based projects. It is ideal for microservices, data science APIs, and real-time applications due to its async support and speed, outperforming traditional frameworks like Flask or Django REST Framework in benchmarks. Use cases include backend services for web/mobile apps, machine learning model deployment, and IoT systems.