mcc, mnc, lac, cellid = location.gsm_location()
# lac, cellid can be used to guess your location
mcc = Mobile Country Code
mnc = Mobile Network Code
lac = Location Area Code
cellid = Cell Id
mcc and mnc is the same wherever you are.
Normally, you would collect some data of your location
and match it with lac/cellid. Then later you can guess
your location from current lac/cellid.