Download the script, make it executable (chmod +x /path/to/pythonTOTP-dmenu) make a file named keysin the same directory (or change the code that references that file)keys` has this structure:
Name of the siteTOTP KEY GIVEN BY THE WEBSITEName of another siteTOTP KEY OF THE SECOND WEBSITE...
The rows with the name is what you'll see in dmenu when you launch this script