json_r/w

import json
data = {
    'name': 'Mahi',
    'mail_id': 'mahi@gmail.com',
    'phone_number': 6301570306,
    'Subject': ['data science', 'big data', 'data analytics']
}

with open('test1.json', 'w') as f:
    json.dump(data, f)

with open('test1.json', 'r') as f:
    data1 = json.load(f)

print(data1)