Coffee Cupping Leaderboard

PandasMediumMid level~10 min

Problem

At a coffee cupping event, each sample receives a quality grade in `points` (two decimals).

**DataFrame: `cupping_results`**

| Column | Type |
|-----------|---------|
| sample_id | int |
| points | decimal |

`sample_id` is unique.

Add a column `placing` that ranks the samples by these rules:

- More `points` → better placing (placing 1 is best).
- Samples with equal `points` share the same placing.
- Placings are consecutive with **no gaps**: after a tie, the next placing is the next whole number.

Return `points` and `placing`, ordered by `points` descending.

Input data

Example rows — the live problem includes the full dataset.

cupping_results

sample_id	points
1	87.5
2	88.25
3	91.0
4	89.75
5	91.0

Expected output

Your answer should return 6 rows with the columns points, placing.

Starter code (Pandas (Python))

import pandas as pd

def cupping_leaderboard(cupping_results) -> pd.DataFrame:
    # Your code here
    return cupping_results

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