A simple REST API using Python and FastAPI

simple_rest_api.py

import uvicorn  # pip install uvicorn
from fastapi import FastAPI  # pip install fastapi
from typing import Optional


# Create the FastAPI application
app = FastAPI()

# A simple example of a GET request


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

# A simple example of a GET request with a path parameter


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


# A simple example of a POST request
@app.post("/items/")
def create_item():
    return {
        "item_id": "created_item_id",
        "q": "created_item_q",
    }


# Run the server
if __name__ == "__main__":
    uvicorn.run("main:app",
                reload=True,  # Reload the server when code changes
                host="127.0.0.1",  # Listen on localhost
                port=5000,  # Listen on port 5000
                log_level="info"  # Log level
                )