Summing multiple values of each key in a dict?

Question

I have a python dictionary, which looks like this.

{ \'item1\' : [1,2,3,4,5,6],
  \'item2\' : [2,3,1],
   .
   .
   .
  \'item n\' : [4,2,4,3,2]
}

Answer 1

This seems unnecessarily complicated. If you have your input as

inpt = { 'item1' : [1,2,3,4,5,6],
         'item2' : [2,3,1],
         .
         .
         .
         'item n' : [4,2,4,3,2]
       }

you can then use a dictionary comprehension instead:

out = {k: [sum(inpt[k])] for k in inpt.keys()}