Mega Code Archive
Set() and frozenset() functions generate mutable and immutable sets, respectively
print set()
print set([])
print set(())
print set('BC')
print frozenset(['foo', 'bar'])
f = open('numbers', 'w')
for i in range(5):
f.write('%d\n' % i)
f.close()
f = open('numbers', 'r')
print set(f)
f.close()