entityMap|blocks|key|d18sd|text|这是一本字典，字典不会保持秩序。您可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|38lno|OrderedDict|b3ad7|取而代之的是。|fi2nn|您还可以添加排序|a9f2p|_|dscam|keys=False参数：|55srs|json.dumps(values,+sort_keys=False)|code-block|syntax|javascript^0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|R|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|S|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|T|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|U|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|V|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|W|9|@]|A|@]|B|$]]|$2|M|4|N|6|O|8|X|9|@]|A|@]|B|$P|Q]]]]

This is a dictionary, and dictionaries don't keep order.
You can use <a href="https://docs.python.org/2/library/collections.html#collections.OrderedDict" rel="noreferrer">OrderedDict</a> instead.

You could also add the sort_keys=False parameter:

<pre><code>json.dumps(values, sort_keys=False)
</code></pre>

entityMap|blocks|key|4jjbi|text|与其他答案一样，在Python+3.6之前，字典是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|fjmgu|无序|cldud|..。|6uk8b|也就是说，|2bc5d|JSON还应该有|7th3l|1s5is|映射|e30pl|，所以原则上，在JSON中存储有序字典没有多大意义。具体地说，这意味着在读取JSON对象时，返回的键的顺序可以是任意的。|fm98i|因此，在JSON中保持映射顺序(如Python键)的一个好方法是输出一个(OrderedDict，value)对数组，您可以在阅读时将其转换回有序映射：|58il1|>>>+from+collections+import+OrderedDict
>>>+import+json
>>>+d+=+OrderedDict([(1,+10),+(2,+20)])+++++++++++++++++++++++++++++++++++++++++
>>>+print+d[2]
20
>>>+json_format+=+json.dumps(d.items())+++++++++++++++++++
>>>+print+json_format++#+Order+maintained
[[1,+10],+[2,+20]]
>>>+OrderedDict(json.loads(json_format))++#+Reading+from+JSON:+works!
OrderedDict([(1,+10),+(2,+20)])
>>>+_[2]++#+This+works!
20|code-block|syntax|javascript|achnh|(请注意，有序字典是从|411d8|列表|397ib|(key，value)对的：|2bi2o|不起作用:它的键不一定像字典文字中那样排序，因为文字创建了一个Python字典，它的键是无序的。)|bpend|PS|ei40v|：从Python+3.1开始，json模块|6enir|提供了一个钩子|a8jo9|用于自动将配对列表(如上面的)转换为其他内容，如OrderedDict。^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|1C|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|1D|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|1E|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|1F|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|1G|9|@]|A|@]|B|$]]|$2|K|4|D|6|7|8|1H|9|@]|A|@]|B|$]]|$2|L|4|M|6|7|8|1I|9|@]|A|@]|B|$]]|$2|N|4|O|6|7|8|1J|9|@]|A|@]|B|$]]|$2|P|4|Q|6|7|8|1K|9|@]|A|@]|B|$]]|$2|R|4|S|6|T|8|1L|9|@]|A|@]|B|$U|V]]|$2|W|4|X|6|7|8|1M|9|@]|A|@]|B|$]]|$2|Y|4|Z|6|7|8|1N|9|@]|A|@]|B|$]]|$2|10|4|11|6|7|8|1O|9|@]|A|@]|B|$]]|$2|12|4|13|6|7|8|1P|9|@]|A|@]|B|$]]|$2|14|4|15|6|7|8|1Q|9|@]|A|@]|B|$]]|$2|16|4|17|6|7|8|1R|9|@]|A|@]|B|$]]|$2|18|4|19|6|7|8|1S|9|@]|A|@]|B|$]]|$2|1A|4|1B|6|7|8|1T|9|@]|A|@]|B|$]]]]

Like the other answers correctly state, before Python 3.6, dictionaries are unordered.

That said, <a href="https://stackoverflow.com/a/4920304/42973">JSON is also supposed to have unordered mappings</a>, so in principle it does not make much sense to store ordered dictionaries in JSON. Concretely, this means that upon reading a JSON object, the order of the returned keys can be arbitrary.

A good way of preserving the order of a mapping (like a Python OrderedDict) in JSON is therefore to output an array of (key, value) pairs that you convert back to an ordered mapping upon reading:

<pre><code>&gt;&gt;&gt; from collections import OrderedDict
&gt;&gt;&gt; import json
&gt;&gt;&gt; d = OrderedDict([(1, 10), (2, 20)]) 
&gt;&gt;&gt; print d[2]
20
&gt;&gt;&gt; json_format = json.dumps(d.items()) 
&gt;&gt;&gt; print json_format # Order maintained
[[1, 10], [2, 20]]
&gt;&gt;&gt; OrderedDict(json.loads(json_format)) # Reading from JSON: works!
OrderedDict([(1, 10), (2, 20)])
&gt;&gt;&gt; _[2] # This works!
20
</code></pre>

(Note the way the ordered dictionary is constructed from a list of (key, value) pairs: <code>OrderedDict({1: 10, 2: 20})</code> would not work: its keys are not necessarily ordered as in the dictionary literal, since the literal creates a Python dictionary whose keys are unordered.)

PS: Starting with Python 3.1, the json modules <a href="https://docs.python.org/3/library/json.html#json.load" rel="noreferrer">offers a hook</a> for automatically converting a list of pairs (like above) to something else like an OrderedDict.

entityMap|blocks|key|6l6i8|text|不能从字典创建OrderedDict，因为在创建dictionary.So时顺序已经更改。最好的方法是使用元组创建OrderedDict|type|unstyled|depth|inlineStyleRanges|entityRanges|data|74km8|from+collections+import+OrderedDict
import+json

a+=+(("name","foo"),("city","bar"),("status","baz"),("country","my"))

b+=+OrderedDict(a)

c+=+{"fileds":+b}

print+json.dumps(c)
Output:
{"fileds":+{"name":+"foo",+"city":+"bar",+"status":+"baz",+"country":+"my"}}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

You cannot create an OrderedDict from a dict because order has already changed the moment you create a dictionary.So best way is to use tuples to create a OrderedDict

<pre><code>from collections import OrderedDict
import json

a = (("name","foo"),("city","bar"),("status","baz"),("country","my"))

b = OrderedDict(a)

c = {"fileds": b}

print json.dumps(c)
Output:
{"fileds": {"name": "foo", "city": "bar", "status": "baz", "country": "my"}}
</code></pre>

entityMap|blocks|key|13ve6|text|你可以选择|type|unstyled|depth|inlineStyleRanges|entityRanges|data|31rab|将被使用，而不是普通的|6p2ea|在创建json对象以记住插入顺序时：|1io9d|>>>+from+collections+import+OrderedDict
>>>+a+=+'{"fields":+{+"name":+"%25s",+"city":+"%25s",+"status":+"%25s",+"country":+"%25s"+}}'
>>>+b+=+json.loads(a,+object_pairs_hook=OrderedDict)
>>>+json.dumps(b)
'{"fields":+{"name":+"%25s",+"city":+"%25s",+"status":+"%25s",+"country":+"%25s"}}'|code-block|syntax|javascript^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|M|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|N|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|O|9|@]|A|@]|B|$J|K]]]]

You can choose <code>OrderedDict</code> to be used instead of an ordinary <code>dict</code> when creating a json object to remember the order of insertions:

<pre><code>&gt;&gt;&gt; from collections import OrderedDict
&gt;&gt;&gt; a = '{"fields": { "name": "%s", "city": "%s", "status": "%s", "country": "%s" }}'
&gt;&gt;&gt; b = json.loads(a, object_pairs_hook=OrderedDict)
&gt;&gt;&gt; json.dumps(b)
'{"fields": {"name": "%s", "city": "%s", "status": "%s", "country": "%s"}}'
</code></pre>

entityMap|blocks|key|16kqd|text|Python+3.6.1：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5rfre|Python+3.6.1+(default,+Oct+10+2020,+20:16:48)
[GCC+7.4.0]+on+linux
Type+"help",+"copyright",+"credits"+or+"license"+for+more+information.

>>>+import+json
>>>+json.dumps({'b':+1,+'a':+2})
'{"b":+1,+"a":+2}'|code-block|syntax|javascript|6dp4h|Python+2.7.5：|3c1l9|Python+2.7.5+(default,+Nov+20+2015,+02:00:19)+
[GCC+4.8.5+20150623+(Red+Hat+4.8.5-4)]+on+linux2
Type+"help",+"copyright",+"credits"+or+"license"+for+more+information.

>>>+import+json
>>>+json.dumps({'b':+1,+'a':+2})
'{"a":+2,+"b":+1}'^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|M|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|N|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|O|9|@]|A|@]|B|$F|G]]]]

Python 3.6.1:
<pre><code>Python 3.6.1 (default, Oct 10 2020, 20:16:48)
[GCC 7.4.0] on linux
Type &quot;help&quot;, &quot;copyright&quot;, &quot;credits&quot; or &quot;license&quot; for more information.

&gt;&gt;&gt; import json
&gt;&gt;&gt; json.dumps({'b': 1, 'a': 2})
'{&quot;b&quot;: 1, &quot;a&quot;: 2}'
</code></pre>
Python 2.7.5:
<pre><code>Python 2.7.5 (default, Nov 20 2015, 02:00:19) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-4)] on linux2
Type &quot;help&quot;, &quot;copyright&quot;, &quot;credits&quot; or &quot;license&quot; for more information.

&gt;&gt;&gt; import json
&gt;&gt;&gt; json.dumps({'b': 1, 'a': 2})
'{&quot;a&quot;: 2, &quot;b&quot;: 1}'
</code></pre>

I'm working with the <a href="https://docs.python.org/2/library/json.html" rel="noreferrer">json module</a> creating a <code>json</code> file containing entries of the like

<pre><code>json.dumps({"fields": { "name": "%s", "city": "%s", "status": "%s", "country": "%s" }})
</code></pre>

However, in the <code>json</code>-file created the fields are in the wrong order

<pre><code>{"fields": {"status": "%s", "city": "%s", "name": "%s", "country": "%s"}}
</code></pre>

which is a problem because the substitions for the <code>%s</code>-strings are now incorrect.

How can I force the <code>dumps</code> function to keep the given order?

json.dumps messes up order

Python

JSON

 我正在使用 json模块 创建 包含类似条目的文件 json.dumps({"fields": { "name": "%s", "city": "%s", "status": "%s", "country": "%s" }}) 但是，在 -file创建的字段顺序错误 {"fields": {"status": "%s...

问json.dumps打乱了订单
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