The ratio of Height/width of block of building by grasshopper

Hello All, 

I'am a new member in this forum, thank you for all efforts provided to enlighten us about this interest tool, I'am in the begining way, my question here is about the ratio of the Height/Width of block of buildin, could you show me please how I can obtain this ratio to do a parametric study in order to optimize the comfort in the spaces between buildings, I wonder to see an example file of grasshopper which allow me to undrestand the compenents needed to calculate this ratio , please I'am waiting for your reply. Thank you in advance 

with my best regards