FastAPI is a modern, fast (high-performance), web framework for building APIs with Python 3.7+ based on standard Python type hints. It's designed to make it easy to create robust and high-performing APIs quickly, with automatic generation of OpenAPI documentation, and it is ideal for building RESTful services.
- Performance: FastAPI is one of the fastest Python web frameworks available. It is built on Starlette for the web parts and Pydantic for the data parts. The framework is designed to be high-performance, and it takes full advantage of modern Python's async capabilities.
- Automatic Documentation: FastAPI automatically generates OpenAPI and JSON Schema documentation based on the type hints you provide in your code. This feature makes it easy for developers to document and understand the API endpoints.
- Data Validation: FastAPI uses Pydantic to validate request data. You define your data models using Python type annotations, and FastAPI will automatically validate the data against these models.
- Dependency Injection: FastAPI supports dependency injection out of the box, making it easy to manage dependencies in a clean and maintainable way. This feature is useful for things like database connections, authentication, and more.
- Asynchronous Support: FastAPI is built on top of Python’s asyncio library, allowing for writing asynchronous code, which is particularly useful for I/O-bound tasks like database queries and external API calls.
- Security: FastAPI includes several built-in tools for handling security, such as OAuth2, JWT, and more, making it easier to build secure APIs.
- Scalability: FastAPI is highly scalable, making it suitable for projects ranging from small to large-scale applications. It is commonly used in production environments and has been adopted by many companies due to its performance and ease of use.
