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Python | Sort JSON by value

  • Last Updated : 12 Feb, 2019

Let’s see the different ways to sort the JSON data using Python.

What is JSON ?
JSON (JavaScript Object Notation) is a lightweight, text-based, language-independent data exchange format that is easy for humans and machines to read and write. JSON can represent two structured types: objects and arrays. An object is an unordered collection of zero or more name/value pairs. An array is an ordered sequence of zero or more values. The values can be strings, numbers, booleans, null, and these two structured types.

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The task is to sort the JSON first by code, then by grade and then by enrollment_no .



Code #1: Sorting in Desc order




# Python code to demonstrate sorting in JSON.
import json
  
data='''{  
   "Student":[  
      {  
         "enrollment_no":"9915103000",
         "name":"JIIT",
         "subject":[  
            {  
               "code":"DBMS",
               "grade":"C"
            }
         ]
      },
      {  
         "enrollment_no":"8815103057",
         "name":"JSS",
         "subject":[  
            {  
               "code":"COA",
               "grade":"A"
            },
            {  
               "code":"CN",
               "grade":"A+"
            }
         ]
      }
   ]
}'''
  
# Parsing Json object
json_parse = json.loads(data)
   
# iterating 
for it in json_parse['Student']:
    for y in it['subject']:
        print(y['code'],y['grade'],it['enrollment_no'],it['name'])

Output :

DBMS C 9915103000 JIIT
COA A 8815103057 JSS
CN A+ 8815103057 JSS

 
Code #2 : By using External library such as Pandas (Sorting in Ascending order).




from pandas.io.json import json_normalize
  
df = json_normalize(json_parse['Student'],
                               'subject'
                    ['enrollment_no', 'name'])
  
df.sort_values(['code', 'grade', 'enrollment_no']).reset_index(drop=True)

Output:

  code grade  enrollment_no      name
0  CN     A+  8815103057         JSS
1  COA    A  8815103057         JSS
2  DBMS   C  9915103000        JIIT



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