First, using a set, as Zero Piraeus told us, you can
myset = set([3,4,5,6,2])
while myset:
myset.pop()
print(myset)
I added a print
method giving these outputs
>>>
set([3, 4, 5, 6])
set([4, 5, 6])
set([5, 6])
set([6])
set([])
If you want to stick to your choice for a list, I suggest you deep copy the list using a list comprehension, and loop over the copy, while removing items from original list. In my example, I make length of original list decrease at each loop.
l = list(myset)
l_copy = [x for x in l]
for k in l_copy:
l = l[1:]
print(l)
gives
>>>
[3, 4, 5, 6]
[4, 5, 6]
[5, 6]
[6]
[]
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