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FastAPI Fundamentals

Introduction to FastAPI

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Why FastAPI?

FastAPI: Modern Python Web Framework

FastAPI is a modern, high-performance web framework for building APIs with Python 3.7+ based on standard Python type hints.

Key Features

  • Fast: Very high performance, on par with NodeJS and Go
  • Fast to code: 200-300% faster development speed
  • Type hints: Full editor support with autocompletion
  • Automatic docs: Interactive API documentation (Swagger UI)
  • Validation: Automatic request validation with Pydantic

Installation

bash

Your First API

python

Visit http://127.0.0.1:8000 to see your API. Visit /docs for interactive documentation!