def rename_columns(self, col):
        """ Rename columns of dataframe.
        
        Parameters
        ----------
        col     : list(str)
            List of columns to rename.

        """
        try:
            self.cleaned_data.columns = col
        except Exception as e:
            raise e
Rename columns of dataframe.
        
        Parameters
        ----------
        col     : list(str)
            List of columns to rename.