FAQ: Iterables and Iterators - Combinatoric Iterator: Combinations

This community-built FAQ covers the “Combinatoric Iterator: Combinations” exercise from the lesson “Iterables and Iterators”.

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Hello! Could you please explain why do I get the same results with those two lines?


for combo in list(collar_combo_iterator):


for combo in collar_combo_iterator:

This lesson tells that “if we want to use the returned object directly, it must be explicitly converted into an iterable type (list, set, dictionary, etc) first.”

I supposed, that (2) will result with an error, but it also prints combinations. Is looping though the object not a direct usage of the the object?
Thanks in advance!

Iterators all have one thing in common… They are consumable, meaning they give up their values when they are polled. Converting to an iterable such as a list gives us something we can reuse or modify. If we just want to do a one and done iteration, for will consume the iterator, and we don’t need to convert for posterity.


Got it, thank you very much! :grinning:

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