Python FastAPI: Notes

My FastAPI notes.

Installation

pip install "fastapi[all]"

Basic App: Assume filename main.py

from typing import Optional
from fastapi import FastAPI

app = FastAPI()

@app.get("/")
def read_root():
    return {"Hello": "World"}

@app.get("/items/{item_id}")
def read_item(item_id: int, q: Optional[str] = None):
    return {"item_id": item_id, "q": q}

To start the API service

uvicorn main:app --reload

• To access API Documentation, http://ip.port/docs