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Answers and rating deltas for
I want to check if 2 columns of any row from df1 == the same 2 columns of any row in df2
| Author | Votes | Δ |
|---|---|---|
| Ronak Shah | 3 | +1.69 |
| Ritchie Sacramento | 2 | -0.15 |
| Rui Barradas | 2 | +0.36 |
| akrun | 0 | -1.46 |
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