merge two dictionaries by key and sum values

Asked Nov 21 '18 at 18:21

Active Nov 21 '18 at 18:24

Viewed 55 times

I have dictA {'1': 3, '3': 0, '2', 1}

and dictB {'2': 0, '1': 1, '3', 4}

Both dictionaries will always be the same length, but the order of their key/value pairs may vary.

How do I merge dictA with dictB and sum the values according to the keys?

The output, from above, would be:

{'1': 4, '3', 4, '2', 1}

(order of the key/value pairs doesn't matter)

asked Nov 21 '18 at 18:21

yodish

In Python 2, there's no such thing as "the order" of the keys and values. Dictionaries do not remember that information. – Kevin Nov 21 '18 at 18:23
@Kevin, Unless it's an `OrderedDict()`. – l'L'l Nov 21 '18 at 18:26
Thanks, I had searched but missed that post somehow. It had what I needed. – yodish Nov 22 '18 at 02:43

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