Flask app "Restarting with stat"
Use run(use_reloader=False) to disable the reloader.
It gave me some problems where it wasn't able to find my server file when it restarted. This did the trick. It executed just once and everything worked. Quite odd.
If you run with app.run(debug=True), it will run the reloader as part of debug mode. If you don't want to use debug mode, pass debug=False or don't pass it at all.
Check your version of Werkzeug. Version 0.10 was just released and numerous changes went into the reloader. One change is that a default polling reloader is used; the old pyinotify reloader was apparently inaccurate. If you want more efficient polling, install the watchdog package. You can see the code related to this here.
When Werkzeug can't find watchdog, it uses the stat reloader, otherwise it uses whatever reloader watchdog uses, which can vary by platform. This message is just so you know which one is in use.
Watchdog may not be compatible with gevent. If you're using gevent and having issues with the reloader when using Watchdog, check this GitHub issue.