python创建有序字典OrderedDict()

python 有序字典OrderedDict

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# -*- coding:utf-8 -*- """   python有序字典   需导入模块collections """ import collections # 通过OrderedDict类创建的字典是有序的 dic = collections.OrderedDict() dic['k1'] = 'v1' dic['k2'] = 'v2' dic['k3'] = 'v3' print dic   """     类似通过列表的方式来实现字典有序     创建列表,添加列表元素k1时,再将k1作为字典的键，     因为列表是序的，所以遍历列表就可有序的遍历出字典所有的key """ dic = {'K1': 'V1', 'K2': 'V2', 'K3': 'V3'} li = ['k1', 'k2', 'k3']