Comprehension to find the min in a dict

Question

I am curious about a thing:

I have a dict, for example with a car as key and a value regarding its speed. Now, I want to find the key with the lowest value.

Answer 1

The thing is you shouldn't solve this problem with a comprehension because you can't do assignment in a comprehension. Iterating the dictionary you can find the minimum in a single pass:

car_iterator = iter(car_dict.items())
slowest_car, min_speed = next(car_list)
for car, speed in car_iterator:
    if speed < min_speed:
        slowest_car = car