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Answers and rating deltas for
How can you count the rows that occur only once in a DataFrame?
| Author | Votes | Δ |
|---|---|---|
| jezrael | 10 | +0.45 |
| ALollz | 1 | +0.27 |
| Max Ghenis | 1 | +1.90 |
| ecortazar | 0 | -2.31 |
| gold_cy | 0 | -0.66 |
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