json.dumps()
is what you want here, if you use print(json.dumps(pairs))
you will get your expected output:
>>> pairs = {'arun': 'maya', 'bill': 'samantha', 'jack': 'ilena', 'hari': 'aradhana'}
>>> print(pairs)
{'arun': 'maya', 'bill': 'samantha', 'jack': 'ilena', 'hari': 'aradhana'}
>>> import json
>>> print(json.dumps(pairs))
{"arun": "maya", "bill": "samantha", "jack": "ilena", "hari": "aradhana"}