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importjsonemp='{"id": "9", "name": "Nitin", "dept": "Finance"}'emp_dict=json.loads(emp)print(emp_dict)print(emp_dict['name'])

Output

{'id': '9', 'name': 'Nitin', 'dept': 'Finance'}Nitin

Reading JSON from File

If you have JSON data stored in a .json file (for example, downloaded from an API or stored locally), Python's json module makes it easy to read and convert it into a Python dictionary using the json.load() function.

Assume the file data.json contains:

Example:

importjsonf=open('data.json',)data=json.load(f)foriindata['emp_details']:print(i)f.close()

Output:

Convert Python Dictionary to JSON String

Python dictionaries can be easily converted to JSON strings using json.dumps(). This is useful when you want to send data over the network or store it in a text-based format.

importjsonemp={"id":"4","name":"Sunil","department":"HR"}json_obj=json.dumps(emp,indent=4)print(json_obj)

Output

{    "id": "4",    "name": "Sunil",    "department": "HR"}

Python to JSON Data Type Conversion

Here's how Python's native types are converted to JSON equivalents:

Python	JSON Equivalent
dict	object
list, tuple	array
str	string
int, float	number
True	true
False	false
None	null

Writing JSON to a file in Python

Use json.dump() to write a Python dictionary to a JSON file. This is helpful for saving configuration, logs, user data or processed results.

importjsondata={"name":"Sathiyajith","rollno":56,"cgpa":8.6,"phonenumber":"9976770500"}withopen("sample.json","w")asoutfile:json.dump(data,outfile)

Output

Python Pretty Print JSON

When JSON is returned as a single line, it’s hard to read. You can pretty print JSON with indentation and sorted keys using thejson.dumps() function.

Example:

importjsonemp='{"id":"9", "name": "Nitin", "department":"Finance"}'emp_d=json.loads(emp)print(json.dumps(emp_d,indent=4,sort_keys=True))

Output

{    "department": "Finance",    "id": "9",    "name": "Nitin"}

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