Python创建有序词典
示例
您可以创建有序字典，当对字典中的键进行迭代时，该字典将遵循确定的顺序。
OrderedDict从collections模块使用。迭代时，这将始终以原始插入顺序返回字典元素。
from collections import OrderedDict
d = OrderedDict()
d['first'] = 1
d['second'] = 2
d['third'] = 3
d['last'] = 4
# Outputs "first 1", "second 2", "third 3", "last 4"
for key in d:
print(key, d[key])