python dict字典循环遍历性能 iteritems比items快

dict字典循环遍历,从测试结果看,iteritems比items快一个数量级 测试 In [32]: def add_dic(a, num): ...: for i in range(num): ...: a[i] = "value" + str(i) ...: In [33]: def xun(a): ...: print "b
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