def __get_lowpoints(node, dfs_data):
ordering_lookup = dfs_data['<STR_LIT>']<EOL>t_u = T(node, dfs_data)<EOL>sorted_t_u = sorted(t_u, key=lambda a: ordering_lookup[a])<EOL>lowpoint_1 = sorted_t_u[<NUM_LIT:0>]<EOL>lowpoint_2 = sorted_t_u[<NUM_LIT:1>]<EOL>return lowpoint_1, lowpoint_2<EOL>
Calculates the lowpoints for a single node in a graph.