I have some columns that I want to sum in a new column
| A | B | C |
|---|---|---|
| 1 | 2 | 2 |
EXPECTED OUTPUT
| A | B | C | D |
|---|---|---|---|
| 1 | 2 | 2 | 5 |
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4`df['D'] = df[['A','B','C']].sum(axis=1)`. – Quang Hoang May 02 '23 at 19:11
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Welcome to stack overflow. Please [edit] your question to include a [mcve] showing _code_ for what you've already tried based on your own research, and what went wrong with your attempts. Please note that this is not a code-writing or tutorial site, and we ask that you at least make an attempt to solve the problem so that we can offer specific advice and answers – G. Anderson May 02 '23 at 19:16