Python help

So im using python (an older version) and i have a list of country names and an associated numbers, I need to sort these countries from highest to lowest in terms of that number,

Also I need to associate this list with another list, and there are some countries in the second list that are not in the first... durr?????

He showed us the final result...That he did in python... And i have an idea how to do it, i just dont know the commands and the syntax's...