input file looks like this :
"2009,Dan Films" 1
"2009,Darius Films" 1
"2009,Dark Castle Entertainment" 4
"2009,Darko Entertainment" 1
"2009,Das Kleine Fernsehspiel (ZDF)" 1
"2009,Dash Films" 1
i want to sort the file based on the last value which is the frequency of occurrence of that <year , company> pair in python . Please guide me