Flask: Debug Mode

Using ‘app.run(debug=True)’ to avoid excessive server restarts

Adding debug=True parameter to app.run() will prevent developer from having to restart server each time app.py file is modified. As the following example shows:

if __name__ == '__main__':
    app.run(debug=True)

Debug mode will return lines of status information whenever a change to app.py is detected, as demonstrated in the example below:

 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 123-987-654

Once the app.py file is finalized, then the if statement can return to its original state:

if __name__ == '__main__':
    app.run()