[Solved] Given a JSON string representing a list of dictionaries, how can you deserialize it and extract the value of key 'id' from the first dictionary?json_str = '[{"id": 101, "name": "A"}, {"id":... | Python

Python - Structured Data Files

Given a JSON string representing a list of dictionaries, how can you deserialize it and extract the value of key 'id' from the first dictionary?

json_str = '[{"id": 101, "name": "A"}, {"id": 102, "name": "B"}]'

Apy_list = json.dumps(json_str); print(py_list[0]['id'])

Bpy_list = json.loads(json_str); print(py_list[0]['id'])

Cpy_list = json.load(json_str); print(py_list['id'])

Dpy_list = json.loads(json_str); print(py_list['id'])

Step-by-Step Solution

Solution:

Step 1: Deserialize JSON string to Python list
Use json.loads(json_str) to convert the JSON string into a Python list of dictionaries.
Step 2: Access first dictionary and get 'id'
Access the first element with py_list[0] and then get the 'id' value with ['id'].
Final Answer:
py_list = json.loads(json_str); print(py_list[0]['id']) -> Option B
Quick Check:
loads() to list, index then key access [OK]

Quick Trick: loads() returns list; index then key for value [OK]

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Given a JSON string representing a list of dictionaries, how can you deserialize it and extract the value of key 'id' from the first dictionary?