Add values from two dictionaries

Question

dict1 = {a: 5, b: 7}
dict2 = {a: 3, c: 1}

result {a:8, b:7, c:1}

How can I get the result?

Answer 1

You can use collections.Counter which implements addition + that way:

>>> from collections import Counter
>>> dict1 = Counter({'a': 5, 'b': 7})
>>> dict2 = Counter({'a': 3, 'c': 1})
>>> dict1 + dict2
Counter({'a': 8, 'b': 7, 'c': 1})

if you really want the result as dict you can cast it back afterwards:

>>> dict(dict1 + dict2)
{'a': 8, 'b': 7, 'c': 1}