def DFS (G, v): yield v visited = set ([v]) S = neighbors (v) while S: w = S.pop() if w not in visited: yield w visited.add (w) S.extend (neighbors (w))
def DFS (G, v): yield v visited = set ([v]) S = neighbors (v) while S: w = S.pop() if w not in visited: yield w visited.add (w) S.extend (neighbors (w))