JSON

The json library can parse JSON from either strings or files. The library parses JSON into a Python dictionary or list. It can also convert Python dictionaries or lists into JSON strings.

Parsing JSON

Take the following string containing JSON data:



In [1]:

    
import json

json_string = '{"first_name": "Guido", "last_name":"Rossum"}'

print(type(json_string))
parsed_json = json.loads(json_string)
print(parsed_json)
print(type(parsed_json))









    



<class 'str'>
{'first_name': 'Guido', 'last_name': 'Rossum'}
<class 'dict'>



In [3]:

    
print(parsed_json['first_name'], parsed_json['last_name'])









    



Guido Rossum



In [5]:

    
with open("random.json") as f:
    parsed_json = json.loads(f.read())
    print(parsed_json)
    print(type(parsed_json))









    



{'results': [{'user': {'gender': 'male', 'name': {'title': 'mr', 'first': 'ernest', 'last': 'coleman'}, 'location': {'street': '6735 greenhaven ln', 'city': 'sunnyvale', 'state': 'connecticut', 'zip': '33332'}, 'email': 'ernest.coleman20@example.com', 'username': 'yellowdog409', 'password': 'ledzep', 'salt': '7iDblTIm', 'md5': '3c9871f954d86c58d3f49b98a7fb60c3', 'sha1': 'd6cb9b8abb27f9718ee9185b2cde298665a177b5', 'sha256': '4fdb19e71c66c91f27f5208cc2a59ca8833ed9b72c549f11ea6a881ffde23c65', 'registered': '1315463131', 'dob': '468664323', 'phone': '(348)-196-2669', 'cell': '(757)-671-8341', 'SSN': '641-99-7751', 'picture': {'large': 'http://api.randomuser.me/portraits/men/72.jpg', 'medium': 'http://api.randomuser.me/portraits/med/men/44.jpg', 'thumbnail': 'http://api.randomuser.me/portraits/thumb/men/47.jpg'}, 'version': '0.6', 'nationality': 'US'}, 'seed': '369a24e79c2f8676'}]}
<class 'dict'>

Updated example



In [23]:

    
py = {
    'first_name': 'Guido',
    'second_name': 'Rossum',
    'titles': ['BDFL', 'Developer'],
}

data = json.dumps(d)
print(data)
print(type(data))









    



["mayank", "Venky", "Prashant Bhandarkar"]
<class 'str'>



In [20]:

    
d = ["mayank", "Venky", "Prashant Bhandarkar"]

data = json.dumps(d)
print(data)
print(type(data))









    



["mayank", "Venky", "Prashant Bhandarkar"]
<class 'str'>

JSON to load into an OrderedDict



In [26]:

    
import collections
py = str(py).replace("'", '"')
json.JSONDecoder(object_pairs_hook=collections.OrderedDict).decode(str(py))









    Out[26]:





OrderedDict([('first_name', 'Guido'),
             ('second_name', 'Rossum'),
             ('titles', ['BDFL', 'Developer'])])



In [44]:

    
from collections import OrderedDict
# OrderedDict as ordereddict

lnct_batch = """{
    "es": ["Mukesh Bansal", "Kirti Khanna", "Jyoti Pancholi", "Nishant Shrivastava", "Gajendra Bandi"],
    "cs": ["Amit Shrivastava"]
}"""

data = json.loads(lnct_batch,  object_pairs_hook=OrderedDict)
print(json.dumps(data, indent=4))









    



{
    "es": [
        "Mukesh Bansal",
        "Kirti Khanna",
        "Jyoti Pancholi",
        "Nishant Shrivastava",
        "Gajendra Bandi"
    ],
    "cs": [
        "Amit Shrivastava"
    ]
}



In [40]:

    
data = json.loads('{"foo":1, "bar": 2}', object_pairs_hook=OrderedDict)
print(json.dumps(data, indent=4))









    



{
    "foo": 1,
    "bar": 2
}

Examples



In [9]:

    
import json  
student = {"101":{"class":'V', "Name":'Rohit',  "Roll_no":7},  
           "102":{"class":'V', "Name":'David',  "Roll_no":8},  
           "103":{"class":'V', "Name":'Samiya', "Roll_no":12}}  
print(json.dumps(student))









    



{"101": {"class": "V", "Name": "Rohit", "Roll_no": 7}, "102": {"class": "V", "Name": "David", "Roll_no": 8}, "103": {"class": "V", "Name": "Samiya", "Roll_no": 12}}



In [14]:

    
import json  
student = {"101":{"Name":'Rohit',"Class":'V', "Roll_no":7},  
           "102":{"Name":'David',"Class":'V', "Roll_no":8},  
           "103":{"Name":'Samiya',"Class":'V', "Roll_no":12}}  
print(json.dumps(student, sort_keys=True));









    



{"101": {"Class": "V", "Name": "Rohit", "Roll_no": 7}, "102": {"Class": "V", "Name": "David", "Roll_no": 8}, "103": {"Class": "V", "Name": "Samiya", "Roll_no": 12}}



In [15]:

    
import json  
tup1 = 'Red', 'Black', 'White';  
print(json.dumps(tup1));









    



["Red", "Black", "White"]



In [16]:

    
import json  
list1 = [5, 12, 13, 14];  
print(json.dumps(list1));









    



[5, 12, 13, 14]



In [17]:

    
import json  
string1 = 'Python and JSON';  
print(json.dumps(string1));









    



"Python and JSON"



In [18]:

    
import json  
x = True;  
print(json.dumps(x));









    



true



In [19]:

    
import json  
json_data = '{"103": {"class": "V", "Name": "Samiya", "Roll_n": 12}, "102": {"class": "V", "Name": "David", "Roll_no": 8}, "101": {"class": "V", "Name": "Rohit", "Roll_no": 7}}';  
print(json.loads(json_data));









    



{'103': {'class': 'V', 'Name': 'Samiya', 'Roll_n': 12}, '102': {'class': 'V', 'Name': 'David', 'Roll_no': 8}, '101': {'class': 'V', 'Name': 'Rohit', 'Roll_no': 7}}



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