JSON

JSON (JavaScript Object Notation) is a way of expressing information. JSON is usually easy to understand. It can express information like XML. It is based on JavaScript's notation for object literals. However, JSON is stricter.

JSON and XML are both often used in AJAX. Even though JSON is named after JavaScript, it can be used in other programming languages, such as Python (PHP, etc.)

Example

This is an example of JSON:

{
     "firstName": "John",
     "lastName" : "Smith",
     "age"      : 25,
     "address"  :
     {
         "streetAddress": "21 2nd Street",
         "city"         : "New York",
         "state"        : "NY",
         "postalCode"   : "10021"
     },
     "phoneNumber":
     [
         {
           "type"  : "",
           "number": "212 555-1234"
         },
         {
           "type"  : "fax",
           "number": "646 555-4567"
         }
     ]
 }

JSON Encoding and Decoding in Python

Encoding:

import json

sampleDict = {
  "firstName": "John",
  "lastName" : "Smith"
}

sampleJson = json.dumps(sampleDict, indent=4)

Decoding:

import json

# A JSON string or can be a JSON response
sampleJson = """{ "firstName": "John", "lastName" : "Smith"}"""

sampleDict = json.loads(sampleJson)
print(sampleDict['firstName'])
print(sampleDict['lastName'])

References

  1. ↑ "RFC 4627". Datatracker.ietf.org. 2011-10-26. Retrieved 2011-10-31.
  2. ↑ "What is the JSON format? | Data Basecamp". 2022-07-30. Retrieved 2022-08-11.
  3. 1 2 "JSON". JSON. Retrieved 2011-10-31.
  4. ↑ "JSON Beats XML, or Ajaj vs Ajax". Ajaxonomy. 2010-12-07. Archived from the original on 2011-10-14. Retrieved 2011-10-31.
  5. ↑ "18.2. json — JSON encoder and decoder — Python v2.7.2 documentation". Docs.python.org. Retrieved 2011-10-31.

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