Sort dictionary keys where the key is also a dictionary

Question

I have just a quick question about how to sort a dictionary like this:

What I have is:

vehicles = {"carA": {"speed": 20, "color": "red"}, "carB": {"speed": 25, "color": "blue"}}

What I want is a list where the vehicle dictionary is sorted by the high of the speed (the speed of carB is higher than that of carA so carB is the first one in the list):

vehicles_list = [{"carB": {"speed": 25, color: "blue"}}, {"carA": {"speed": 20, color: "red"}}]

Answer 1

Try using the key argument of the build-in sorted function

vehicles_list = sorted([{k:v} for k,v in vehicles.items()], 
                       key=lambda x: list(x.values())[0]['speed'],
                       reverse=True)

NOTE I have modified color in your dict to be a string, unless it is a type defined by you it is an error