def bfs(graph, root):
    visited, queue = [], [root]
    while queue:
        vertex = queue.pop(0)
        for w in graph[vertex]:
            if w not in visited:
                visited.append(w)
                queue.append(w)

graph = {0: [1, 2], 1: [2], 2: []}
bfs(graph, 0)

Does this look like a correct implementation of BFS in Python 3?