drop list of columns pandas
df.drop([item for item in total_cols if item not in columns_in_use], axis=)
drop list of columns pandas
df.drop([item for item in total_cols if item not in columns_in_use], axis=)
delete columns pandas
df = df.drop(df.columns[[0, 1, 3]], axis=1) # df.columns is zero-based pd.Index
df.drop(['column_nameA', 'column_nameB'], axis=1, inplace=True)
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