如何排序OrderedDict的OrderedDict?

问题描述

我正在尝试通过'depth'键对OrderedDict中的OrderedDict进行排序.有什么解决办法可以对Dictionary进行排序吗?

I'm trying to sort OrderedDict in OrderedDict by 'depth' key.Is there any solution to sort that Dictionary ?

OrderedDict([
  (2, OrderedDict([
    ('depth', 0),
    ('height', 51),
    ('width', 51),
    ('id', 100)
  ])),
  (1, OrderedDict([
    ('depth', 2),
    ('height', 51),
    ('width', 51),
    ('id', 55)
  ])),
  (0, OrderedDict([
    ('depth', 1),
    ('height', 51),
    ('width', 51),
    ('id', 48)
  ])),
])

排序的字典应如下所示:

Sorted dict should look like this:

OrderedDict([
  (2, OrderedDict([
    ('depth', 0),
    ('height', 51),
    ('width', 51),
    ('id', 100)
  ])),
  (0, OrderedDict([
    ('depth', 1),
    ('height', 51),
    ('width', 51),
    ('id', 48)
  ])),
  (1, OrderedDict([
    ('depth', 2),
    ('height', 51),
    ('width', 51),
    ('id', 55)
  ])),
])

任何想法如何得到它?

Any idea how to get it?

推荐答案

由于OrderedDict是按插入顺序排序的，因此您必须创建一个新的

You'll have to create a new one since OrderedDict is sorted by insertion order.

在您的情况下，代码如下所示:

In your case the code would look like this:

foo = OrderedDict(sorted(foo.iteritems(), key=lambda x: x[1]['depth']))

请参见 http://docs.python.org /dev/library/collections.html#ordereddict-examples-and-recipes 以获得更多示例.

See http://docs.python.org/dev/library/collections.html#ordereddict-examples-and-recipes for more examples.

对于Python 3，请注意，您需要使用.items()而不是.iteritems().

Note for Python 3 you will need to use .items() instead of .iteritems().

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