CODEWITHSUNDEEP
pythonjsonlist
doniyor
doniyor

Reputation: 37866

How to add an element to a list?

From this..

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

...I will get:

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

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

Any idea how to do it?

Upvotes: 17

Views: 165622

Answers (3)

Waldeyr Mendes da Silva
Waldeyr Mendes da Silva

Reputation: 1165

import json

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

{"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"}]}

Upvotes: 2

myaut
myaut

Reputation: 11504

Elements are added to list using append():

>>> 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:

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

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

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

Upvotes: 9

pinturic
pinturic

Reputation: 2263

I would do this:

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

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

Upvotes: 39

Related Questions