Serializing JSON data in Python

Serialization is the process of converting Python objects into JSON-compatible data. Python's built-in json module provides methods to serialize data into a JSON file or a JSON string.

Methods for Serializing JSON Data

Using json.dump()

The json.dump() method serializes a Python object and writes the resulting JSON data to a file. Below is the syntax

json.dump(dict, file_pointer)

Parameters:

• dictionary – name of dictionary which should be converted to JSON object.
• file pointer – pointer of the file opened in write or append mode.

import json
data = {
    "user": {
        "name": "satyam kumar",
        "age": 21,
        "Place": "Patna",
        "Blood group": "O+"
    }
}

with open( "datafile.json" , "w" ) as write:
    json.dump( data , write )

Output:

Explanation:

• json provides functions for working with JSON data.
• data stores the Python dictionary.
• open() creates or opens data.json in write mode.
• json.dump() writes the dictionary to the JSON file.

Using json.dumps()

The json.dumps() method converts a Python object into a JSON-formatted string without writing it to a file. Below is the syntax

json.dumps(dict)

Parameters:

• dictionary – name of dictionary which should be converted to JSON object.

Below is the implementation:

Converting python object into json string.

import json
data = {
    "user": {
        "name": "satyam kumar",
        "age": 21,
        "Place": "Patna",
        "Blood group": "O+"
    }

res = json.dumps(data )
print( res )

Output:

Explanation:

• data stores the Python dictionary.
• json.dumps() converts the dictionary into a JSON-formatted string.
• result stores the converted string.
• print() displays the JSON string.