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from collections import defaultdict | ||
from typing import Dict, List | ||
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def merge(*dicts: Dict[str, int]) -> Dict[str, List[int]]: | ||
out = defaultdict(list) | ||
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for d in dicts: | ||
for k, v in d.items(): | ||
out[k].append(v) | ||
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return dict(out) | ||
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def test_merge(): | ||
assert merge({}, {}, {}) == {} | ||
assert merge({"A": 1, "B": 2, "C": 3}) == {"A": [1], "B": [2], "C": [3]} | ||
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assert merge({"A": 1}, {"B": 2}) == {"A": [1], "B": [2]} | ||
assert ( | ||
merge({"A": 1, "B": 2, "C": 3}, {"A": 4, "D": 5}) | ||
== {"A": [1, 4], "B": [2], "C": [3], "D": [5]} | ||
) |