The error 'FastAPI' object has no attribute 'run' typically occurs when you're trying to run a FastAPI application in the same way as a Flask application. In Flask, you can use app.run() to start the server, but FastAPI doesn't have a run method. Instead, you should use an ASGI server, such as Uvicorn or Hypercorn, to serve your FastAPI application.
The code you provided doesn't show an attempt to use a run method on a FastAPI application, so I can't point to a specific line of code that's causing the error. However, if you were trying to do something like app.run(), that would be the cause of the error.
To fix the issue, you should remove the app.run() line (if it exists) and instead start your FastAPI application using an ASGI server. For example, if you're using Uvicorn, you can start your application from the command line like this:
uvicorn main:app --reload
In this command, main should be replaced with the name of the Python file that contains your FastAPI application (without the .py extension), and app is the name of your FastAPI instance. The --reload flag enables hot reloading, which means the server will automatically update whenever you make changes to your code.
If you want to start the server from within your Python code, you can do so like this:
import uvicorn
if __name__ == "__main__":
uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
Again, replace main with the name of your Python file and app with the name of your FastAPI instance. The host and port parameters determine where your server will be accessible, and the reload parameter enables hot reloading.
The error
'FastAPI' object has no attribute 'run'typically occurs when you're trying to run a FastAPI application in the same way as a Flask application. In Flask, you can useapp.run()to start the server, but FastAPI doesn't have arunmethod. Instead, you should use an ASGI server, such as Uvicorn or Hypercorn, to serve your FastAPI application.The code you provided doesn't show an attempt to use a
runmethod on a FastAPI application, so I can't point to a specific line of code that's causing the error. However, if you were trying to do something likeapp.run(), that would be the cause of the error.To fix the issue, you should remove the
app.run()line (if it exists) and instead start your FastAPI application using an ASGI server. For example, if you're using Uvicorn, you can start your application from the command line like this:In this command,
mainshould be replaced with the name of the Python file that contains your FastAPI application (without the.pyextension), andappis the name of your FastAPI instance. The--reloadflag enables hot reloading, which means the server will automatically update whenever you make changes to your code.If you want to start the server from within your Python code, you can do so like this:
Again, replace
mainwith the name of your Python file andappwith the name of your FastAPI instance. Thehostandportparameters determine where your server will be accessible, and thereloadparameter enables hot reloading.