如何将元素添加到 json 列表 - python

how to add element to json list - python

提问by doniyor

From this

由此

data = json.loads(urlopen('someurl').read())

I will get:

我会得到：

{'list': [{'a':'1'}]}

I want to add {'b':'2'}into the list.

我想添加{'b':'2'}到list.

Any idea how to do it?

知道怎么做吗？

采纳答案by pinturic

I would do this:

我会这样做：

data["list"].append({'b':'2'})

so simply you are adding an object to the list that is present in "data"

因此，您只需将一个对象添加到“数据”中存在的列表中

回答by myaut

Elements are added to list using append():

使用append()以下方法将元素添加到列表中：

>>> data = {'list': [{'a':'1'}]}
>>> data['list'].append({'b':'2'})
>>> data
{'list': [{'a': '1'}, {'b': '2'}]}

If you want to add element to a specific place in a list (i.e. to the beginning), use insert()instead:

如果要将元素添加到列表中的特定位置（即开头），请insert()改用：

>>> data['list'].insert(0, {'b':'2'})
>>> data
{'list': [{'b': '2'}, {'a': '1'}]}

After doing that, you can assemble JSON again from dictionary you modified:

这样做之后，您可以从您修改的字典中再次组装 JSON：

>>> json.dumps(data)
'{"list": [{"b": "2"}, {"a": "1"}]}'

回答by Waldeyr Mendes da Silva

import json

myDict = {'dict': [{'a': 'none', 'b': 'none', 'c': 'none'}]}
test = json.dumps(myDict)
print(test)

{"dict": [{"a": "none", "b": "none", "c": "none"}]}

{"dict": [{"a": "none", "b": "none", "c": "none"}]}

myDict['dict'].append(({'a': 'aaaa', 'b': 'aaaa', 'c': 'aaaa'}))
test = json.dumps(myDict)
print(test)

{"dict": [{"a": "none", "b": "none", "c": "none"}, {"a": "aaaa", "b": "aaaa", "c": "aaaa"}]}

{"dict": [{"a": "none", "b": "none", "c": "none"}, {"a": "aaaa", "b": "aaaa", " c": "aaaa"}]}