def get_string_index(index, padding=2):
    """
    Returns the string equivalent for the given integer index
    :param index: int, the index to get the string equivalent for
    :param padding: int, number of characters for the index string
    :return: str
    """

    str_ind = str(index)
    for i in range(padding - len(str_ind)):
        str_ind = '0' + str_ind

    return str_ind