FAQ: Graph Search: Python - A Breadth of Fresh Neighbors

This community-built FAQ covers the “A Breadth of Fresh Neighbors” exercise from the lesson “Graph Search: Python”.

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FAQs on the exercise A Breadth of Fresh Neighbors

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Hello Codecademy Team, I am finding it difficult to implement DFS and BFS algorithms.
I implemented it but I don’t know what my code does.
Can u please add video at the end of instructions. so that students like me will be able to grasp difficult concepts quickly.



Looking up BFS on other sites, theirs is far more simple and easy to follow. You simply populate and then depopulate the queue.

This algorithm uses a vertex and path list to build a path and a queue and I am very, very lost.

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Hello. It’d be nice if this exercise didn’t refuse to accept “if not neighbor in visited:” as opposed to “if neighbor not in visited:” when they are the exact same thing :expressionless: Especially since I’m 99% sure I did it that way on the previous one and it did accept it.

I’m not an expert, but I think there IS a difference between the two expressions. When you code not neighbor in visited, you may be saying: "When the value which isn’t None, (or when it’s None, I’m not sure), is in visited.

Totally agreed! I finished the section but don’t feel like I understood it completely although I went through it very slowly in 3 hours. I have to check via other sites to fully understand it.