How to dynamically build a JSON object?

json, python

Solution

You build the object before encoding it to a JSON string:

import json

data = {}
data['key'] = 'value'
json_data = json.dumps(data)

JSON is a serialization format, textual data representing a structure. It is not, itself, that structure.

Problem

I am new to Python and I am playing with JSON data. I would like to dynamically build a JSON object by adding some key-value to an existing JSON object. I tried the following but I get `TypeError: 'str' object does not support item assignment`: ``` import json json_data = json.dumps({}) json_data["key"] = "value" print 'JSON: ', json_data ```

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