[python tutorial] Python JSON

Python JSON

In this chapter we will introduce how to use Python language to encode and decode JSON objects.

Environment configuration

Before using Python to encode or decode JSON data, we need to install the JSON module first. We will download Demjson and install this tutorial:

$tar xvfz demjson-1.6.tar.gz
$cd demjson-1.6
$python setup.py install

E

JSON function

Function

Description

Encode encodes the Python object into a JSON string

Decode and decoded the coded JSON string to Python to Python Object

encode

Python encode() function is used to encode Python objects into JSON strings.

Syntax

demjson.encode(self, obj, nest_level=0)

Example

The following example encodes an array into JSON format data:

#!/usr/bin/python
import demjson

data = [ { 'a' : 1, 'b' : 2, 'c' : 3, 'd' : 4, 'e' : 5 } ]

json = demjson.encode(data)
print json

The execution result of the above code is:

[{"a":1,"b":2,"c":3,"d":4,"e":5}]

decode

Python can use the demjson.decode() function to decode JSON data. This function returns the data type of the Python field.

Grammar

demjson.decode(self, txt)

Example

The following example shows how Python decodes JSON objects:

#!/usr/bin/python
import demjson

json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';

text = demjson.decode(json)
print  text

The execution result of the above code is:

{u'a': 1, u'c': 3, u'b': 2, u'e': 5, u'd': 4}

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