Starting FastAPI

• To start a FastAPI app you will need to set up first a path operation

# Import FastAPI framework
from fastapi import FastAPI

# Set up the App
app = FastAPI()

# Set up the path operation
@app.get("/")
async def root():
    return {"message": "Hello World"}

• Then you will have to run the uvicorn webserver by using the file name followed by the app name in said file

uvicorn main:app

# If you get an error that uvicorn is not valid use:
python -m uvicorn main:app --reload

• This should return the information that the browser is running on local host

INFO:     Started server process [21240]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)

• Now you can access the API in the browser and see the message