Help on getting net names and Instance names on a path untill sequential(DFF) circuit is found.

 Hi all,

        I am trying to write a script for getting instance names and net names on path in digital circuit untill sequential circuit (like DFF) found in schematic. I want to check it hierarchy level also.  For example when I select some net in schematic thenSome file will show: "EN", "AND" , "net2", "OR", "net3","NOT" ,"net3" (net 3 will connect to as D in DFF).