Tree data of a CBB

Hi.I want to generate a file(xlsx) which contains the data of a CBB,like all its hierarchies with their properties

for example consider a block named "A" which contains a inverter and 2 transistors

I need the name of the transistors,Cell name where they are present,width, number of legs to be recorded.

and it should list the details of the transistors present in the inverter used in the block "A"