def __get_initial_center(self, return_index):
index_center = random.randint(<NUM_LIT:0>, len(self.__data) - <NUM_LIT:1>)<EOL>if return_index:<EOL><INDENT>return index_center<EOL><DEDENT>return self.__data[index_center]<EOL>
!
        @brief Choose randomly first center.

        @param[in] return_index (bool): If True then return center's index instead of point.

        @return (array_like) First center.<br>
                (uint) Index of first center.