This will insert a new column at index and then set the value
            unless compute_value is provided
        :param index: int index of where to insert the column
        :param column: str of the name of the column
        :param default_value: obj of the default value
        :param values: obj of the column values (length should equal table)
        :param compute_value_func: func to compute the value given the row
        :param compute_key: str of the column to send to computer_value_func
                instead of row
        :return: None

def insert(self, index, column, default_value='', values=None,
               compute_value_func=None, compute_key=None):
        """
            This will insert a new column at index and then set the value
            unless compute_value is provided
        :param index: int index of where to insert the column
        :param column: str of the name of the column
        :param default_value: obj of the default value
        :param values: obj of the column values (length should equal table)
        :param compute_value_func: func to compute the value given the row
        :param compute_key: str of the column to send to computer_value_func
                instead of row
        :return: None
        """
        for row in self.table:
            value = values.pop(0) if values else default_value
            if compute_value_func is not None:
                value = compute_value_func(
                    row if compute_key is None else row[compute_key])

            if index is None:
                row.append(value)
            else:
                row.insert(index, value)

        if index is None:
            self.row_columns += [column]
            if self.row_columns is not self.columns and \
                            column not in self.columns:
                self.columns.append(column)
        else:
            self.row_columns = self.row_columns[:index] + [column] \
                               + self.row_columns[index:]
            self.columns.insert(index, column)

        self._parameters[column] = list(set(self.get_column(column)))