if you have three devices (a,b,c) and you want to get the the distance saved when you compare the distance from (a to b and c to b) with the distance...

if you have three devices (a,b,c) and you want to get the the distance saved when you compare the distance from (a to b and c to b) with the distance from (a to c) while ignoring device b

what to write in python to get which device should be removed and what effect will it have on the path length

for example in python it would show that out of all the devices, device c was removed and this saved 25 meters of distance