Python sum dict values based on keys

Question

How to sum values from dict where values are string. I mean how to sum values where multiply key is same in dictionary.

dict

values = [
    {
                


        

Answer 1

This is a simple and specific solution, I am sure there are more general and cleverer ones. :)

from collections import defaultdict

pr = defaultdict(float)
ra = defaultdict(float)
for el in values:
    combi = (el['prod_name'], el['prod_hola'])
    pr[combi] += el['prihod']
    ra[combi] += el['rashod']

results = [dict(rashod=r, prihod=p, \
                prod_name=nh[0], prod_hola=nh[1]) \
           for r,p,nh in zip(ra.values(), pr.values(), pr)]
print results

gives

[{'rashod': 0.0, 'prihod': 100.0, 'prod_name': 'c', 'prod_hola': 'f'},
 {'rashod': 0.0, 'prihod': 1500.0, 'prod_name': 'a', 'prod_hola': 'b'},
 {'rashod': 0.0, 'prihod': 460.0, 'prod_name': 'r', 'prod_hola': 't'}]