Python 内建函数 - next(iterable[, default])

Manual

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.

直译

通过调用迭代器的__next__()方法来检索它的下一项。如果给定default，当迭代尽时将返回这个值，否则引发StopIteration。

实例

>>> a = [1, 2, 3, 4, 5]
>>> a = iter([1, 2, 3, 4, 5])
>>> next(a)
1
>>> next(a)
2
>>> next(a)
3
···

拓展阅读

iter()