python字典中items和iteritems的区别 python中字典dict类型中iteritems怎么用
Python3\u5b57\u5178\u4e2ditems\u548cpython2.x\u4e2diteritems\u6709\u4ec0\u4e48\u533a\u522bPython3\u5b57\u5178\u7684items\u65b9\u6cd5\u5c31\u662fPython2\u5b57\u5178\u7684iteritems\u65b9\u6cd5
\u90fd\u4f1a\u8fd4\u56deiterator\uff0c\u800c\u4e0d\u662f\u4e00\u4e2alist\uff0citerator\u4e0d\u50cflist\u90a3\u6837\u5360\u7528\u989d\u5916\u7684\u5185\u5b58\u7a7a\u95f4
#\u5b57\u5178\u7684\u6dfb\u52a0\u3001\u5220\u9664\u3001\u4fee\u6539\u64cd\u4f5cdict={"a":"apple","b":"banana","g":"grape","o":"orange"}dict["w"]="watermelon"del(dict["a"])dict["g"]="grapefruit"printdict.pop("b")printdictdict.clear()printdict#\u5b57\u5178\u7684\u904d\u5386dict=
items()返回的是列表对象，而iteritems()返回的是iterator对象。例如：print dic.items() #[('a', 'hello'), ('c', 'you'), ('b', 'how')]
print dic.iteritems() #<dictionary-itemiterator object at 0x020E9A50>
深究：iteritor是迭代器的意思，一次反悔一个数据项，知道没有为止
for i in dic.iteritems():
print i
结果：('a', 'hello')
('c', 'you')
('b', 'how')
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