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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def set_style(self, column, style):
 """Set |Style| for a specific column. Args: column (|int| or |str|):
 Column specifier. column index or header name correlated with the column. style (|Style|):
 Style value to be set to the column. Raises: ValueError: If the column specifier is invalid. """


        column_idx = None

        while len(self.headers) > len(self.__style_list):
            self.__style_list.append(None)

        if isinstance(column, six.integer_types):
            column_idx = column
        elif isinstance(column, six.string_types):
            try:
                column_idx = self.headers.index(column)
            except ValueError:
                pass

        if column_idx is not None:
            self.__style_list[column_idx] = style
            self.__clear_preprocess()
            self._dp_extractor.format_flags_list = [
                _ts_to_flag[self.__get_thousand_separator(col_idx)]
                for col_idx in range(len(self.__style_list))
            ]
            return

        raise ValueError("column must be an int or string: actual={}".format(column))