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I tried to concat two values of two columns in Pandas like this:

new_dfr["MMYY"] = new_dfr["MM"]+new_dfr["YY"]

I got warning message:

SettingWithCopyWarning: 
A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_indexer,col_indexer] = value instead

See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy
  new_dfr["MMYY"] = new_dfr["MM"]+new_dfr["YY"]

How to fix it?

Mandalina
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1 Answers1

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new_dfr["MMYY"] = new_dfr["MM"].astype(str) + new_dfr["YY"].astype(str)
Christian Eslabon
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    Please add context as to *why* you feel this is a viable solution to solving the `SettingWithCopyWarning`. Just posting code is *not* an answer. – S3DEV May 29 '22 at 19:42