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

Specific solution, with no attempt at cleverness:

def regroup(values):
    groups = dict()
    for d in values:
        key = (d["prod_name"], d["prod_hola"])
        if key in groups:
            group = groups[key]
            group["rashod"] += d["rashod"]
            group["prihod"] += d["prihod"]
        else:
            groups[key] = d.copy()
    return list(groups.values())

And a slightly more generic solution:

def generic_regroup(values, keys):
    groups = dict()
    valkeys = [k for k in values[0] if k not in key]
    for d in values:
        key = tuple(d[k] for k in keys)
        if key in groups:
            group = groups[key]
            for k in valkeys:
                group[k] += d[k]
        else:
            groups[key] = d.copy()
    return list(groups.values())

results = generic_regroup(values, ("prod_name", "prod_hola"))

Now someone will certainly chime in with a much more clever solution involving itertools...