code: def __get_neighbors(self, node_index):
          
          
          return [ index for index in range(len(self.__data_pointer[node_index])) if self.__data_pointer[node_index][index] != 0 ];
docs: !
          @brief Returns indexes of neighbors of the specified node.
          
          @param[in] node_index (uint):
          
          @return (list) Neighbors of the specified node.