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

Here's a solution that uses a temporary dict with keys based on the input dict's key value pairs where the values are of type str:

def get_key(d):
    return {k: v for k, v in d.items() if isinstance(v, str)}

def sum_dicts(x, y):
    summed = {k: x.get(k, 0) + y[k] for k, v in y.items() if not isinstance(v, str)}
    summed.update(get_key(y))
    return summed

result = {}
for value in values:
    key = json.dumps(get_key(value))
    result[key] = sum_dicts(result.get(key, {}), value)

print result.values()

Or if you want to use reduce():

def dict_sum_reducer(items, new):
    new_items = map(lambda x: sum_dicts(x, new) if get_key(x) == get_key(new) else x, items)
    if new_items == items:
        new_items.append(new)
    return new_items

print reduce(dict_sum_reducer, values, [])