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How to copy selected columns from a dataframe to another based on a column condition

Say if I have a df with columns A,B,C,D . I wanted to copy df to df1 columns A and B only based on a condition column C = 1 .

Thanks for your help!!

Thanks Scott for your reply.

The first option worked!!!

The second option is giving error 'expr must be a string to be evaluated, <class 'pandas.core.series.Series'> given Code : temp1 = df[['Music', 'Pop', 'Rock']].query(df.Rock == '1.0')

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