Uvicorn can not start FastAPI APP

[cgi1]

import uvicorn
from fastapi import FastAPI
app = FastAPI(title='MADS API')
uvicorn.run(app, host='0.0.0.0', port=8127, workers=2)
WARNING:  You must pass the application as an import string to enable 'reload' or 'workers'.

(Than it quits with System Code 1)

Versions:

$ pip3 list |grep "uvicorn\|fastapi"
fastapi                          0.55.1       
uvicorn                          0.11.5 

Ubuntu 20.04; python 3.8.2

[dhendo]

I think you need to pass the app as a string, rather than directly, as you've passed the workers argument.

uvicorn.run("your_module_name:app", host='0.0.0.0', port=8127, workers=2)

[euri10]

yes @dhendo is right !

[cgi1]

Understand - But how can I define the name of the module here`?

Uvicorn can not find your_module_name:

ERROR: Error loading ASGI app. Could not import module "your_module_name".

[dhendo]

It'll depend on the file name - if for example it was called server.py then the string you should use is "server:app"

[cgi1]

@dhendo This finally solved my issue - Thanks!