[Python] Aggregating and calculating in OrderedDict in Python

Have a OrderedDict "d" looking like that:

[OrderedDict([
('id', '1'),
('date', '20170101'),
('quantity', '10')]),
OrderedDict([
('id', '2'),
('date', '20170102'),
('quantity', '3')]),
OrderedDict([
('id', '3'),
('date', '20170102'),
('quantity', '1')])]


I'm trying to do the group by 'date' and calculating the sum of quantity and display these two columns 'date' and 'sum_quantity'. How can I do that not using pandas groupby options?

Thanks!

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