How to determine if item is last item in a set-CodePudding

I have an arbitrary number of items in a set.

I want to do something different when I am on the last item of the set - is it possible to do so without having to find the length of the set and have a counter variable?

    for e in elements:
        if e is elements[-1]:
            json ='"%s"' % e 
            break
        json ='"%s",' % e

The above code will work for lists, but cannot work here as splices are not supported for sets.

CodePudding user response：

Leaving my comment above, you could do something like this:

s = {"A", "B", "C"}

i = iter(s)

element = next(i, None)

while element is not None:
    next_element = next(i, None)
    if next_element is None:
        # This is the last element
        print(element * 10)
    else:
        print(element)
    element = next_element

OUTPUT

B
A
CCCCCCCCCC

This is just an example how the final element could be applied a different transformation.