Flask app crashes "Restarting with reloader....socket.error: [Errno 98] Address already in use Flask app crashes "Restarting with reloader....socket.error: [Errno 98] Address already in use flask flask

Flask app crashes "Restarting with reloader....socket.error: [Errno 98] Address already in use


python flask webserver jinja2

If the address is already in use change the default port

if __name__ == '__main__':    app.run(host='0.0.0.0', debug=True, port=12345, use_reloader=True)

you can now access the page through http://localhost:12345

python flask webserver jinja2

'Address already in use' means you've got another server running on that computer that's bound to the same port. Turn it off, and you should be good to go.

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