CODE EXAMPLE FOR PYTHON

vscode in browser github

"Go to any GitHub repository and then press the dot/period key on your keyboard."
                      or
"Replace the URL from 'github.com/blah-blah' to 'github.dev/blah-blah'.         "

Visual Studio Code will appear in your browser. 
It will load your entire repository and you can open any file from it. 
You have your entire source code with syntax highlighting and coloring.