Sort by the sum of list values

Write a Python program to map each key to the sum of its list and sort by that sum.

{"x": [1, 5, 6], "y": [4, 8, 2], "c": [3, 9]}

{'x': 12, 'c': 12, 'y': 14}

Approach

1. Sum the lists, then sort by value.

Solution

d = {"x": [1, 5, 6], "y": [4, 8, 2], "c": [3, 9]}sums = {k: sum(v) for k, v in d.items()}print(dict(sorted(sums.items(), key=lambda kv: kv[1])))

{'x': 12, 'c': 12, 'y': 14}

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