Python find numbers not in set

I would add all the items not in the set into a list.

s = set([1,2,3,35,67,87,95])

x = []
for item in range(1, 101):
    if item not in s:
        x.append(item)

print x

Set difference

set(range(1, 101)) - s

Use set difference operation

set(range(1, 101)) - s

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