Python Dict create to own list and add all values with specific Keys in one line

Question

I have a Loop and this Dict as output:

{2.0 : 7, 7.0 : 2}

the Key should be the same, but the Value changes everytime

now I want to create a variable for every Key in the Dict and add the value for the Key.

for k,v in labels.items():
        if k == 2.0:
             cars += v
        elif k == 7.0:
             trucks += v
        else:
            continue 

is there a way to write this as a one Liner?

the other problem: I want to add the Value to the variable for every Key but if i use the += the Variable isn't assigned yet. Do i need to define it before or is there a better way to do it?

Answer 1

Your dictionary is called labels and may contain keys of 2.0 and 7.0

Therefore (although not a one-liner):

cars += labels.get(2.0, 0)
trucks += labels.get(7.0, 0)