Python: ValueError: too many values to unpack

Trabla: Python: ValueError: too many values to unpack

Trabla Code:

car_owners = { 'John':['BMW M5','Subaru Legacy'] , 'Alex':['VW Passat B8','Toyota Camry'] , 'Linda':['Bugatti Veyron'] }
for owner, cars in car_owners: #trabla here
    for car in cars:
        print car

Solving:

car_owners = { 'John':['BMW M5','Subaru Legacy'] , 'Alex':['VW Passat B8','Toyota Camry'] , 'Linda':['Bugatti Veyron'] }
for owner, cars in car_owners.iteritems(): #solving - missing iteritems()
    for car in cars:
        print car