I have tried

export FLASK_ENV=development

then adding

app.config['DEBUG'] = True

to my program but i keep getting

* Serving Flask app "test.py" (lazy loading)
 * Environment: development
 * Debug mode: off
 * Running on https://87466804-e84d-413e-abd1-74dc56624149-ide.cs50.xyz:8080/ (Press CTRL+C to quit)
 * Restarting with stat

I'm unsure why? any help


Have you tried export FLASK_DEBUG=ON

  • Yes i found that this was the solution. However why did this work ? Oct 31 '19 at 14:29
  • If you are using the CS50 IDE, it has debug mode set to OFF by default, so if you want to turn it on, you have to explicitly set it.
    – curiouskiwi
    Oct 31 '19 at 18:11

I had the same issue.. took me a min to figure it out... but you have to use the following:

set FLASK_ENV=development

that should set the debug mode to Active when you restart flask...

Best of luck, Hekyl

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