<s>[INST] How to retrieve an element from a set without removing it? Suppose the following:
>>>s = set([1, 2, 3])

How do I get a value (any value) out of s without doing s.pop()? I want to leave the item in the set until I am sure I can remove it - something I can only be sure of after an asynchronous call to another host.
Quick and dirty:
>>>elem = s.pop()
>>>s.add(elem)

But do you know of a better way? Ideally in constant time.
 [/INST] Two options that don't require copying the whole set:
for e in s:
    break
# e is now an element from s

Or...
e = next(iter(s))

But in general, sets don't support indexing or slicing.
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