Combine tuples in a list and get sum of second tuple element [duplicate]

Question

I have a list of tuples:

tupples = [('d2', 1),
 ('d2', 1), ('d3', 1), ('d10', 1), ('d10', 1), ('d15', 1),
 ('d165', 1), ('d165', 1), ('d172', 1),('d2', 1)]

I want to combine like elements at 0, and sum all elements at 1 so the output looks like:

###[('d2',3),('d165',2),('d10',1),('d3',1),('d15',1),('d172',1)

new =[]
for item in tupples:
    if item[0] in item:
        sums = sum[item[1]]
    new.append((item[0],item1[1]))
        

Answer 1

What about using pandas.DataFrame.groupby ?

>>> import pandas as pd
>>> list(pd.DataFrame(tupples).groupby(0).sum().to_dict()[1].items())
[('d10', 2), ('d15', 1), ('d165', 2), ('d172', 1), ('d2', 3), ('d3', 1)]