Merging two Python dictionaries, summing the values of matching elements?

Posted by jamieb on Stack Overflow See other posts from Stack Overflow or by jamieb
Published on 2010-03-09T01:23:39Z Indexed on 2010/03/09 1:36 UTC
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python

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beginner

Given two dictionaries, like so:

q1_sales = {'Bob': 21000, 'Charles': 18000, 'John': 35000, 'Sam': 14000}
q2_sales = {'Bob': 22000, 'John': 33000, 'Sam': 23000}

What's the most pythonic way to produce this?

total_sales = {'Bob': 43000, 'Charles': 18000, 'John': 68000, 'Sam': 37000}

Thanks!

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