python之函数用法iter()

# -*- coding: utf-8 -*-
#python 27
#xiaodeng
#python之函数用法iter()

#iter()
#说明：对一个对象调用 iter() 就可以得到它的迭代器
‘‘‘
iter(...)
    iter(collection) -> iterator
    collection:容器
    iterator：可迭代对象
    iter(callable, sentinel) -> iterator
‘‘‘

#案例
obj=range(10)
iterObj=iter(obj)
print iterObj#listiterator object

for key in iterObj:
    print key

#下面的方法需要在交互界面才能生效
‘‘‘
>>> d.next()
1
>>> d.next()
2
>>> d.next()
3
‘‘‘

时间： 2024-10-23 16:01:38

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