Convert JSON Dictionary to JSON Array in python

Question

I have JSON dictionary something like this:

{'foo': 3, 'bar': 1}

and i want it in JSON array form:

[ { "key": "foo", "value": 3 }, { "key": "bar", "value": 1 }] 

What should I do?

• Carlo 1585: what did you do so fat? in any case just create an array, append the items and when you finished based on the use you can jsonify() or json.dumps(): stackoverflow.com/questions/7907596/json-dumps-vs-flask-jsonify

Answer 1

You need to iterate over keys and values for this dictionary and then assign the necessary keys in the new dictionary.

import json
input_dict = {'foo': 3, 'bar': 1}
result = []
for k, v in input_dict.items():
 result.append({'key': k, 'value': v})
print(json.dumps(result))

And the result:

[{'value': 3, 'key': 'foo'}, {'value': 1, 'key': 'bar'}]

Answer 2

This could be handled with a list comprehension:

import json
json_dict = {'foo': 3, 'bar': 1}
json_array = [ {'key' : k, 'value' : json_dict[k]} for k in json_dict]
print(json.dumps(json_array))

output:

[{"key": "foo", "value": 3}, {"key": "bar", "value": 1}]

Answer 3

Try this (Python 2.7 and above):

json_dict = {'foo': 3, 'bar': 1} # your original dictionary;
json_array = [] # an array to store key-value pairs;
# Loop through the keys and values of the original dictionary:
for key, value in json_dict.items():
 # Append a new dictionaty separating keys and values from the original dictionary to the array:
 json_array.append({'key': key, 'value': value})

One-liner that does the same thing:

json_array = [{'key': key, 'value': value} for key, value in {'foo': 3, 'bar': 1}.items()]

Hope this helps!