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

import json
parsed_json = json.loads(json_string)

print(parsed_json['first_name'])
"Guido"

d = {
'first_name': 'Guido',
'second_name': 'Rossum',
'titles': ['BDFL', 'Developer'],
}
print(json.dumps(d))
'{"first_name": "Guido", "last_name": "Rossum", "titles": ["BDFL", "Developer"]}'

import simplejson as json