1. 直接创建有序字典
import collections
data = collections.OrderedDict()
data["a"] = "1"
data["b"] = "2"
data["c"] = "3"
print data
# 输出:OrderedDict([('a', '1'), ('b', '2'), ('c', '3')])
2. 将json字符串按字符串顺序转成有序字典
import json
from collections import OrderedDict
jsonStr = '{"a":1,"b":2,"c":3}'
configDict = json.loads(jsonStr, object_pairs_hook=OrderedDict)
print configDict
# 输出:OrderedDict([(u'a', 1), (u'b', 2), (u'c', 3)])
