Python next() built-in function
Examples
>>> i = iter([1, 2, 3])
>>> i
# <list_iterator object at 0x7f93158badc0>
>>> i.__next__()
# 1
>>> i.__next__()
# 2
>>> i.__next__()
# 3
>>> i = iter([1, 2, 3])
>>> i
# <list_iterator object at 0x7f93158badc0>
>>> i.__next__()
# 1
>>> i.__next__()
# 2
>>> i.__next__()
# 3