Python Flask server running twice - can't figure out what is causing it to restart

Question

Every single time I run my python script, it reloads and thus runs the contents of the script twice.

This is a Flask application, and I have Debug=True, but I was under the impression it would only restart the server if I re-saved a file (which I'm not doing). Is it possible to change this behavior? As soon as I remove the Debug=True setting, it stops, but ideally I'd like to be able to have it on for the time being.

My basic run.py file:

from flask import Flask

app = Flask(__name__)
app.config.update(
  # DEBUG = True
)

if (__name__):
  app.run()

What do you mean "runs twice"? It's very hard to run on the same port. Are you sure that's what happens? — Reut Sharabani, Sep 09 '15 at 07:02
Sorry, 'runs twice' was horrible terminology on my part. The server runs, then restarts. — Jimmy Gong, Sep 09 '15 at 07:26
I'm presuming, by "runs, then restarts", you mean that every time you modify a file and save it, the server reloads the file? If so, see my answer to prevent that. — Tux, Sep 09 '15 at 07:52
Yup, would've said thanks, but the StackOverflow Comment Placeholder overlords told me to avoid that. But thanks! — Jimmy Gong, Sep 09 '15 at 08:16

Tux · Accepted Answer · 2015-09-09T07:51:18.087

6

Yes, you can. Where you declare debug=True, add the argument use_reloader=False.

See the Flask API documentation on run for more details.

edited Sep 09 '15 at 07:51

answered Sep 09 '15 at 07:30

Tux

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...link is broken – Regular User Jan 18 '22 at 15:18

Python Flask server running twice - can't figure out what is causing it to restart

1 Answers1