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get the one element from 1-list or 1-set
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get the one element from 1-list or 1-set
i have a list or tuple or set or frozenset with exactly one element within. i'd like to code a simple way to get that one element that can be used with any of those container types. i can't use x[0] since that does not work with set or frozenset .
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next(iter(x)) perhaps?

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