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FastAPI Cheat Sheet
Print-ready cheat sheet for FastAPI, organized for fast lookup, study, and desk-side use
Sample
What's in this cheat sheet
Minimal App
from fastapi import FastAPI
app = FastAPI()
@app.get("/")
async def root():
return {"message": "Hello, World!"}
Run the App
pip install "fastapi[standard]"
fastapi dev main.py # dev with auto-reload
fastapi run main.py # production
Key Features
Async native | async/await with ASGI (Uvicorn) |
Auto docs | Swagger UI at `/docs`, ReDoc at `/redoc` |
Type validation | Pydantic models for request/response |
OpenAPI | Auto-generated OpenAPI schema |
Dependency injection | Built-in DI system |
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