Group dictionary key values in python

Question

I have the following dictionary

mylist = [{\'tpdt\': \'0.00\', \'tmst\': 45.0, \'tmdt\': 45.0, \'pbc\': 30, \'remarks\': False, \'shift\': 1, \'ebct\': \'0.         


        

Answer 1

Here's a code that doesn't require mylist to be sorted by "mc_no" key:

from collections import defaultdict

sums = defaultdict(int)  # key -> sum
for d in mylist:
    sums[d["mc_no"]] += d["tmst"]