def get_column_name(column):
    """
    gets the pure column name from given column name with ordering info.

    for example:

    +age -> age
    age -> age
    -age -> age

    :param str column: column name to extract pure name from it.

    :rtype: str
    """

    if column.startswith(('-', '+')):
        return column[1:]

    return column