def index_from(sequence, x, start_from=0):
    """ Index from a specific start point

    :param sequence: a sequence
    :type sequence: List[object]
    :param x: an object to index
    :type x: object
    :param start_from: start point
    :type start_from: int
    :return: indices of the matched objects
    :rtype: List[int]
    """

    indices = []
    for idx in range(start_from, len(sequence)):
        if x == sequence[idx]:
            indices.append(idx)
    return indices