PYTHON : Flask view return error 'View function did not return a response'

PYTHON : Flask view return error "View function did not return a response"
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I promised to share a hidden feature with you, and here it is.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
After that, type the word 'awesome' on your keyboard.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

A little intro about me,
Greetings, my name is Delphi.
I am willing to help you find the solutions to your questions.
PYTHON : Flask view return error "View function did not return a response"
If you require more detailed information, please don't hesitate to comment or chat with me.
We appreciate your participation, so please feel free to comment below with your answer or insights.
If you provide an answer, I will 'heart' it as a sign of gratitude.
PYTHON "View response" return return function : a not did Flask view error