티스토리 뷰
# Python 3 : Iterator
b = {1, 2, 3}
b_iter = b.__iter__()
print(type(b_iter)) # <class 'set_iterator'>
print(b_iter.__next__()) # 1
print(b_iter.__next__()) # 2
print(b_iter.__next__()) # 3
print(b_iter.__next__()) # StopIteration
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