# Filtering out cyborgs with fuel usage equal to 3
currentname = (cyborg['firstname'] for cyborg in cyborgs if cyborg['fuelusage'] == 3)
#print(currentname) # Has error: <generator object <genexpr> at 0x10fa5bf50>
print(next(currentname)) # Joshua
print('type', type(currentname)) # ('type', <type 'generator'>)

# Another way
currentname = ([cyborg['firstname'] for cyborg in cyborgs if cyborg['fuelusage'] == 3])
print(currentname)
print(type(currentname)) # <type 'list'>
currentname = str(currentname)
print(type(currentname)) # <type 'str'>