When I type flask run and go to 127.0.0.1:5000/myfirstpage, I can see the following output in my terminal:
127.0.0.1 - - [29/Apr/2021 14:55:34] "←[37mGET /myfirstpage HTTP/1.1←[0m" 200 -
I understand that 127.0.0.1 is my localhost server, myfirstpage the path, HTTP/1.1 the version of the hypertext transfer protocol and 200 the HTTP status code for 'successfully responded to request'.
But what do ←[37m and ←[0m stand for?