# FAQ: Graph Search: Python - Breadth-First Search: Take My Breadth Away

This community-built FAQ covers the “Breadth-First Search: Take My Breadth Away” exercise from the lesson “Graph Search: Python”.

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Hi all, a little confused with this exercise as it jumps into us using “pyhton sets”. Unless I’ve missed something, then we havent covered sets on the computer science pathway. Can anyone recommend an exercise on codeacademy that will train me on sets?

Thanks

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Hi there!

I also struggled with the introduction of sets. I found this page very useful in explaining them.

For this exercise, think of them as a Tuple or immutable list that is unordered. There are no indexes. This means each time we call the function, we iterate through the vertices in a different order.

Luckily, I completed the Learn Intermediate Python 3 course which taught me about sets.