blocks|key|670402|text|我没有意识到这是一个mongodb%7Cpymongo问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|670403|a+=+{
++++"id":+"2",
++++"items":+{
++++++++++++++"3"+:+{+"blocks"+:+{+"3"+:+{+"txt"+:+'xx'+}+}+},
++++++++++++++"4"+:+{+"blocks"+:+{+"1"+:+{+"txt"+:+'yy'},+"2"+:+{+"txt"+:+'zz'}+}+}
++++++++++++}
+++++}

a['items']['3']['blocks']['3']['txt']+%2B=+',+yy'|code-block|syntax|javascript|670404|670405|关于如何修改dicts的简短回答：|670406|a+=+{'moo'+:+'cow',+'quack'+:+'duck'}
a['moo']+=+'bull'
a['quack']+=+'duckling'
print(str(a))
if+a['moo']+==+'bull':
++++print+'Yes+the+bull+says+moo'|670407|如果您的数据是JSON字符串，您首先需要将其从JSON字符串转换为Python中的字典，方法是：|670408|import+json
a+=+json.loads(<your+string+goes+here>)|670409|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|T|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|U|8|@]|9|@]|A|$]]|$1|J|3|K|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|L|3|M|5|6|7|W|8|@]|9|@]|A|$]]|$1|N|3|O|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|P|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|Q|$]]

I did not realize that this was a mongodb|pymongo question to start with.

<pre><code>a = {
 "id": "2",
 "items": {
 "3" : { "blocks" : { "3" : { "txt" : 'xx' } } },
 "4" : { "blocks" : { "1" : { "txt" : 'yy'}, "2" : { "txt" : 'zz'} } }
 }
 }

a['items']['3']['blocks']['3']['txt'] += ', yy'
</code></pre>

?

Shorter answer on how to modify dicts:

<pre><code>a = {'moo' : 'cow', 'quack' : 'duck'}
a['moo'] = 'bull'
a['quack'] = 'duckling'
print(str(a))
if a['moo'] == 'bull':
 print 'Yes the bull says moo'
</code></pre>

If your data is a JSON string you first need to convert it from a JSON-string to a dictionary in Python, do so by:

<pre><code>import json
a = json.loads(&lt;your string goes here&gt;)
</code></pre>

blocks|key|668049|text|您需要使用'$push'而不是'$addToSet'|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|668050|dbx.test.update({"_id":+ObjectId("5192264c02a03e374e67d7be")},+{'$push':+{'items.3.blocks.0.txt':+'tt'}},+)|code-block|syntax|javascript|668051|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.mongodb.org/manual/reference/operator/push/|1|http://docs.mongodb.org/manual/reference/operator/addToSet/^0|5|7|0|F|B|1|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|F|7|Z|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|10|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]]]

You need to use <a href="http://docs.mongodb.org/manual/reference/operator/push/" rel="nofollow">'$push'</a> instead of <a href="http://docs.mongodb.org/manual/reference/operator/addToSet/" rel="nofollow">'$addToSet'</a>:

<pre><code>dbx.test.update({"_id": ObjectId("5192264c02a03e374e67d7be")}, {'$push': {'items.3.blocks.0.txt': 'tt'}}, )
</code></pre>

blocks|key|538671|text|很简单，因为将与$addToSet一起工作需要数组中的数据，但数据在{"key":"value"}中，但您有{+"blocks"+:+{+"1"+:+{+"txt"+:+'yy'},+"2"+:+{+"txt"+:+'zz'}+}+}，建议在数组中工作，例如|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|538672|"items":
+++++++++++[
++++++++++++++{+"algo"+:+{+"blocks"+:+{+"txt"+:+['xx']}+}+}+,
++++++++++++++{+"algoo"+:+{+"blocks"+:+{+"txt"+:+['yy','zz']}+}+}
++++++++++++]
db.foo.update({"_id":1,"items.algo.blocks.txt":'xx'},{$addToSet:{"items.$.algo.blocks.txt":'tt'}});|code-block|syntax|javascript|538673|并且在字段name中不使用数字。|538674|{
++++++++"_id"+:+1,
++++++++"items"+:+[
++++++++++++++++{
++++++++++++++++++++++++"algo"+:+{
++++++++++++++++++++++++++++++++"blocks"+:+{
++++++++++++++++++++++++++++++++++++++++"txt"+:+[
++++++++++++++++++++++++++++++++++++++++++++++++"xx",
++++++++++++++++++++++++++++++++++++++++++++++++"tt"
++++++++++++++++++++++++++++++++++++++++]
++++++++++++++++++++++++++++++++}
++++++++++++++++++++++++}
++++++++++++++++},
++++++++++++++++{
++++++++++++++++++++++++"algoo"+:+{
++++++++++++++++++++++++++++++++"blocks"+:+{
++++++++++++++++++++++++++++++++++++++++"txt"+:+[
++++++++++++++++++++++++++++++++++++++++++++++++"yy",
++++++++++++++++++++++++++++++++++++++++++++++++"zz"
++++++++++++++++++++++++++++++++++++++++]
++++++++++++++++++++++++++++++++}
++++++++++++++++++++++++}
++++++++++++++++}
++++++++]
}|538675|entityMap^0|Y|F|1I|1R|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

is simple, for will work with $addToSet need the data in arrays [ ] but you have the data in <code>{"key":"value"}</code>, but you have <code>{ "blocks" : { "1" : { "txt" : 'yy'}, "2" : { "txt" : 'zz'} } }</code>, would recommend work in Arrays, Example 

<pre><code>"items":
 [
 { "algo" : { "blocks" : { "txt" : ['xx']} } } ,
 { "algoo" : { "blocks" : { "txt" : ['yy','zz']} } }
 ]
db.foo.update({"_id":1,"items.algo.blocks.txt":'xx'},{$addToSet:{"items.$.algo.blocks.txt":'tt'}});
</code></pre>

and no use numbers in fields name.

<pre><code>{
 "_id" : 1,
 "items" : [
 {
 "algo" : {
 "blocks" : {
 "txt" : [
 "xx",
 "tt"
 ]
 }
 }
 },
 {
 "algoo" : {
 "blocks" : {
 "txt" : [
 "yy",
 "zz"
 ]
 }
 }
 }
 ]
}
</code></pre>

I have below an example of data:

<pre><code>{
 "id": "2",
 "items":
 {
 "3" : { "blocks" : { "3" : { "txt" : 'xx' } } },
 "4" : { "blocks" : { "1" : { "txt" : 'yy'}, "2" : { "txt" : 'zz'} } }
 }
 }
</code></pre>

I want to make it so that it looks like the below example data. Simply append a new value to items.3.blocks.3.txt while keeping existing value of it:

<pre><code> {
 "id": "2",
 "items":
 {
 "3" : { "blocks" : { "3" : { "txt" : 'xx, tt' } } },
 "4" : { "blocks" : { "1" : { "txt" : 'yy'}, "2" : { "txt" : 'zz'} } }
 }
 }
</code></pre>

I run below but did not make any difference

<pre><code>dbx.test.update({"_id": ObjectId("5192264c02a03e374e67d7be")}, {'$addToSet': {'items.3.blocks.0.txt': 'tt'}}, )
</code></pre>

what should be correct syntax, any help is appreciated...
regards

add a new value to array while keeping existing one

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个数据的例子：{        "id": "2",        "items":            {              "3" : { "blocks" : { "3" : { "txt" : 'xx' } } },              "4" : { "blocks" : { "1" :...

问将新值添加到数组中，同时保留现有值
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问将新值添加到数组中，同时保留现有值EN