python 字典排序
orderedDict 保持元素插入时的顺序
from collections import OrderedDict
d = OrderedDict() d['foo'] = 1 d['bar'] = 2 d['spam'] = 3 d['grok'] = 4
Outputs "foo 1", "bar 2", "spam 3", "grok 4"
for key in d: print(key, d[key])
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from collections import OrderedDict
d = OrderedDict() d['foo'] = 1 d['bar'] = 2 d['spam'] = 3 d['grok'] = 4
for key in d: print(key, d[key])