How to get all the keys with the same highest value?

Question

If I have a dictionary with their corresponding frequency values:

numbers = {a: 1, b: 4, c: 1, d: 3, e: 3}

To find the highest, what I know

Answer 1

numbers = {'a': 1, 'b': 0, 'c': 1, 'd': 3, 'e': 3}
max_value = max(numbers.values())


[k for k,v in numbers.iteritems() if v == max_value]

prints

 ['e', 'd']

what it does is, loop over all entries via .iteritems and then check if the value is the maximum and if so add the key to a list.