Bake-Off Division Champions

PandasHardSenior level~10 min

Problem

You are given two DataFrames. `bakers` (from `bakers.csv`) has columns `baker_id` and `division`; each baker competes in exactly one division. `bakeoffs` (from `bakeoffs.csv`) has columns `bakeoff_id`, `left_baker`, `right_baker`, `left_score`, `right_score`; each row is one head-to-head bake-off between two bakers and the score each earned in it.

Sum every baker's total score across all bake-offs they appeared in (a baker with no bake-offs has a total of 0). For each division, return the champion: the baker with the highest total score, breaking ties by the smaller `baker_id`. Output columns: `division`, `baker_id`.

Input data

Example rows — the live problem includes the full dataset.

bakers

baker_id	division
11	1
22	1
33	1
44	1
55	2

bakeoffs

bakeoff_id	left_baker	right_baker	left_score	right_score
1	11	44	3	0
2	33	22	1	2
3	33	11	2	0
4	77	55	5	2
5	66	88	1	1

Expected output

Your answer should return 3 rows with the columns division, baker_id.

Starter code (Pandas (Python))

import pandas as pd

def division_champions(bakers, bakeoffs) -> pd.DataFrame:
    # Your code here
    return bakers

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