def __init__(self, index, core_distance = None, reachability_distance = None):
<EOL>self.index_object = index<EOL>self.core_distance = core_distance<EOL>self.reachability_distance = reachability_distance<EOL>self.processed = False<EOL>
!
        @brief Constructor of object description in optics terms.

        @param[in] index (uint): Index of the object in the data set.
        @param[in] core_distance (double): Core distance that is minimum distance to specified number of neighbors.
        @param[in] reachability_distance (double): Reachability distance to this object.