Python next() built-in function
From the Python 3 documentation
Retrieve the next item from the iterator by calling its __next__() method. If default is given, it is returned if the iterator is exhausted, otherwise StopIteration is raised.
>>> i = iter([1, 2, 3]) >>> i # <list_iterator object at 0x7f93158badc0> >>> i.__next__() # 1 >>> i.__next__() # 2 >>> i.__next__() # 3
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