json.dumps() in Python

First, use json.loads() method to convert JSON String to Python object. To convert this object to a pretty print JSON string, the json.dumps() method is used. Below are examples and steps to better understand these cases.

Syntax: json.dumps(obj, indent,separator)

Parameter:

• obj: Serialize obj as a JSON formatted stream
• indent: If indent is a non-negative integer or string, then JSON array elements and object members will be pretty-printed with that indent level. An indent level of 0, negative, or “” will only insert newlines.
• separators : If specified, separators should be an (item_separator, key_separator) tuple. 

Pretty Print JSON String

This method has the parameter indent to specify the number of spaces and a separator parameter to specify the separator between key and value. By default, the separator is a comma between key-value pairs and a colon between key and value. If the indent parameter of json.dumps() is negative, 0, or an empty string then there are no indentations and only newlines are inserted. By default, the indent is None and the data is represented in a single line.

The code takes a JSON string containing student records, parses it into a Python data structure, then pretty-prints the JSON data with proper indentation for improved readability.

Output:

[
   {
       "studentid": 1,
       "name": "ABC",
       "subjects": [
           "Python",
           "Data Structures"
       ]
   },
   {
       "studentid": 2,
       "name": "PQR",
       "subjects": [
           "Java",
           "Operating System"
       ]
   }
]

Pretty-Printed JSON data into a file with indent=0.

The code takes a JSON string containing student records, parses it into a Python data structure, and then pretty-prints the JSON data with zero indentation, making it compact and less readable.

Output:

[
{
"studentid": 1,
"name": "ABC",
"subjects": [
"Python",
"Data Structures"
]
},
{
"studentid": 2,
"name": "PQR",
"subjects": [
"Java",
"Operating System"
]
}
]

Write Pretty Print JSON data to file

To write a Python object as JSON Pretty Print format data into a file, json.dump() method is used. Like json.dumps() method, it has the indents and separator parameters to write beautified JSON.

Output:

JSON stands for JavaScript Object Notation. It is a format for structuring data. This format is used by different web applications to communicate with each other. In this article, we will learn about JSON pretty print