GeezerVison

This Python JSON exercise helps Python developers to practice JSON creation, manipulation, and parsing. As you know, JSON (an acronym for JavaScript Object Notation) is a data-interchange format and is commonly used for client-server communication.

This exercise includes the following: –

• It has 9 questions and solutions provided for each question.
• Each question includes a specific JSON concept you need to learn. When you complete each question, you get more familiar with JSON encoding and decoding in Python.
• Also, Solve Python Exercises: 29 topic-wise exercises with over 800+ coding questions

Use Online Code Editor to solve exercise questions.

Exercise 1: Convert the following dictionary into JSON format

data = {"key1" : "value1", "key2" : "value2"}Code language: Python (python)

Expected Output:

data = {"key1" : "value1", "key2" : "value2"}

import json

data = {"key1" : "value1", "key2" : "value2"}

jsonData = json.dumps(data)
print(jsonData)Code language: Python (python)

Exercise 2: Access the value of key2 from the following JSON

import json

sampleJson = """{"key1": "value1", "key2": "value2"}"""
# write code to print the value of key2Code language: Python (python)

Expected Output:

value2

import json

sampleJson = """{"key1": "value1", "key2": "value2"}"""

data = json.loads(sampleJson)
print(data['key2'])Code language: Python (python)

Exercise 3: PrettyPrint following JSON data

PrettyPrint following JSON data with indent level 2 and key-value separators should be (",", " = ").

sampleJson = {"key1": "value1", "key2": "value2"}Code language: Python (python)

Expected Output:

{
  "key1" = "value2",
  "key2" = "value2",
  "key3" = "value3"
}

import json

sampleJson = {"key1" : "value2", "key2" : "value2", "key3" : "value3"}
prettyPrintedJson  = json.dumps(sampleJson, indent=2, separators=(",", " = "))
print(prettyPrintedJson)
Code language: Python (python)

Exercise 4: Sort JSON keys in and write them into a file

Sort following JSON data alphabetical order of keys

sampleJson = {"id" : 1, "name" : "value2", "age" : 29}Code language: Python (python)

Expected Output:

{
    "age": 29,
    "id": 1,
    "name": "value2"
}

import json

sampleJson = {"id" : 1, "name" : "value2", "age" : 29}

print("Started writing JSON data into a file")
with open("sampleJson.json", "w") as write_file:
    json.dump(sampleJson, write_file, indent=4, sort_keys=True)
print("Done writing JSON data into a file")Code language: Python (python)

Exercise 5: Access the nested key ‘salary’ from the following JSON

import json

sampleJson = """{ 
   "company":{ 
      "employee":{ 
         "name":"emma",
         "payble":{ 
            "salary":7000,
            "bonus":800
         }
      }
   }
}"""

# write code to print the value of salaryCode language: Python (python)

Expected Output:

7000

import json

sampleJson = """{ 
   "company":{ 
      "employee":{ 
         "name":"emma",
         "payble":{ 
            "salary":7000,
            "bonus":800
         }
      }
   }
}"""

data = json.loads(sampleJson)
print(data['company']['employee']['payble']['salary'])
Code language: Python (python)

Exercise 6: Convert the following Vehicle Object into JSON

import json

class Vehicle:
    def __init__(self, name, engine, price):
        self.name = name
        self.engine = engine
        self.price = price

vehicle = Vehicle("Toyota Rav4", "2.5L", 32000)

# Convert it into JSON formatCode language: Python (python)

Expected Output:

{
    "name": "Toyota Rav4",
    "engine": "2.5L",
    "price": 32000
}

import json
from json import JSONEncoder

class Vehicle:
    def __init__(self, name, engine, price):
        self.name = name
        self.engine = engine
        self.price = price

class VehicleEncoder(JSONEncoder):
        def default(self, o):
            return o.__dict__

vehicle = Vehicle("Toyota Rav4", "2.5L", 32000)

print("Encode Vehicle Object into JSON")
vehicleJson = json.dumps(vehicle, indent=4, cls=VehicleEncoder)
print(vehicleJson)Code language: Python (python)

Exercise 7: Convert the following JSON into Vehicle Object

{ "name": "Toyota Rav4", "engine": "2.5L", "price": 32000 }

For example, we should be able to access Vehicle Object using the dot operator like this.

vehicleObj.name, vehicleObj.engine, vehicleObj.price

import json

class Vehicle:
    def __init__(self, name, engine, price):
        self.name = name
        self.engine = engine
        self.price = price

def vehicleDecoder(obj):
        return Vehicle(obj['name'], obj['engine'], obj['price'])

vehicleObj = json.loads('{ "name": "Toyota Rav4", "engine": "2.5L", "price": 32000 }',
           object_hook=vehicleDecoder)

print("Type of decoded object from JSON Data")
print(type(vehicleObj))
print("Vehicle Details")
print(vehicleObj.name, vehicleObj.engine, vehicleObj.price)Code language: Python (python)

Exercise 8: Check whether following json is valid or invalid. If Invalid correct it

{ 
   "company":{ 
      "employee":{ 
         "name":"emma",
         "payble":{ 
            "salary":7000
            "bonus":800
         }
      }
   }
}

echo { "company":{ "employee":{ "name":"emma", "payble":{ "salary":7000 "bonus":800} } } } | python -m json.tool
Code language: Python (python)

Expecting ',' delimiter: line 1 column 68 (char 67)

import json

def validateJSON(jsonData):
    try:
        json.loads(jsonData)
    except ValueError as err:
        return False
    return True

InvalidJsonData = """{ "company":{ "employee":{ "name":"emma", "payble":{ "salary":7000 "bonus":800} } } }"""
isValid = validateJSON(InvalidJsonData)

print("Given JSON string is Valid", isValid)Code language: Python (python)

Exercise 9: Parse the following JSON to get all the values of a key ‘name’ within an array

[ 
   { 
      "id":1,
      "name":"name1",
      "color":[ 
         "red",
         "green"
      ]
   },
   { 
      "id":2,
      "name":"name2",
      "color":[ 
         "pink",
         "yellow"
      ]
   }
]

Expected Output:

["name1", "name2"]

import json

sampleJson = """[ 
   { 
      "id":1,
      "name":"name1",
      "color":[ 
         "red",
         "green"
      ]
   },
   { 
      "id":2,
      "name":"name2",
      "color":[ 
         "pink",
         "yellow"
      ]
   }
]"""

data = []
try:
    data = json.loads(sampleJson)
except Exception as e:
    print(e)

dataList = [item.get('name') for item in data]
print(dataList)
Code language: Python (python)