There are three dictionary methods for extracting certain data. .keys() returns the keys in the dictionary as a list (sort of), and .values() returns the dictionary values as a list (sort of). Why "sort of"? Because the returned objects are not a list per se -- they are their own list-like types, called dict_keys and dict_values.
On the other hand, .items() returns both keys and values, but as a quasi-list of (key, value) tuples:
>>> simpsons.items() # .items() returns a quasi-list of key, value tuplesdict_items([('Homer', 36), ('Lisa', 8), ('Marge', 35), ('Bart', 10)])
Dictionaries are orderless, but often it's necessary to impose a certain order (e.g., alphabetical) when processing dictionary entries. You achieve this by sorting the keys. See Sorting for details.
Practice
Add Maggie and Grandpa Abe Simpson to the simpsons dictionary. Their respective ages: 1 and 65.