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I want to multiply two columns in a pandas DataFrame and add the result into a new column
| Author | Votes | Δ |
|---|---|---|
| bmu | 16 | +3.33 |
| Andy Hayden | 4 | +0.03 |
| Aman | 1 | -3.61 |
Last visited: Sep 14, 2014, 5:07:29 AM