python 字典排序

orderedDict 保持元素插入時的順序

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])