>>> a = iter('abcd')
>>> next(a)
'a'
>>> next(a)
'b'
>>> next(a)
'c'
>>> next(a)
'd'
>>> next(a)
Traceback (most recent call last):
File "<pyshell#18>", line 1, in <module>
next(a)
StopIteration
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>>> a = iter('abcd')
>>> next(a)
'a'
>>> next(a)
'b'
>>> next(a)
'c'
>>> next(a)
'd'
>>> next(a)
Traceback (most recent call last):
File "<pyshell#18>", line 1, in <module>
next(a)
StopIteration
相关文章：