extract nested dictonary from String data[PYTHON]

Question

I have a dictionary data , which has a key message and value is string .

the value in the dictionary is a combination of string + inner-dictionary.

I want to extract inner-dictionary as a separate dictionary.

Example-input

data = {'message': '[INFO]-processed-result - {"customer_id": "cust_111","user_ids":[1,2,3],"collection":{"default":"def_1"}}'}

Example_output

output = {"customer_id": "cust_111","user_ids":[1,2,3],"collection":{"default":"def_1"}}

I don't want to use python SPLIT

Can anyone suggest solution for this?

Answer 1

You can simply search for the first { and use indexing to get the location of the dictionary within the string.

import ast

index_dict = data['message'].find('{')
output = ast.literal_eval(data['message'][index_dict:])

Answer 2

Use Regular Expressions:

import re
import ast

data = {'message': '[INFO]-processed-result - {"customer_id": "cust_111","user_ids":[1,2,3],"collection":{"default":"def_1"}}'}
output = {"customer_id": "cust_111","user_ids":[1,2,3],"collection":{"default":"def_1"}}

message = re.findall(r'^\[INFO\]-processed-result - (.*)', data['message']).pop()
output = ast.literal_eval(message)
print(output)

Answer 3

Another way using index method of str and using inbuilt eval

>>> data = {'message': '[INFO]-processed-result-2020-10-01T23:45:49.472Z- {"customer_id": "cust_111","user_ids":[1,2,3],"collection":{"default":"def_1"}}'}
>>> index = data['message'].index('{')
>>> output = eval(data['message'][index:])
>>> output
{'customer_id': 'cust_111', 'user_ids': [1, 2, 3], 'collection': {'default': 'def_1'}}
>>>
>>> data = {'message': '[INFO]-processed-result - {"customer_id": "cust_111","user_ids":[1,2,3],"collection":{"default":"def_1"}}'}
>>> index = data['message'].index('{')
>>> output = eval(data['message'][index:])
>>> output
{'customer_id': 'cust_111', 'user_ids': [1, 2, 3], 'collection': {'default': 'def_1'}}

You can also consider using json.loads() for a faster solution

>>> import json
>>> json.loads(data['message'][index:])
{'customer_id': 'cust_111', 'user_ids': [1, 2, 3], 'collection': {'default': 'def_1'}}