Parse JSON into Python objects

Easy

≈ 6 minute session

Summary

Use the json module to convert a JSON string into Python objects safely.

Problem statement

Given a string containing JSON data, parse it into the corresponding Python object using the json module. If the input is not valid JSON, return None. Your function should handle JSON objects, arrays, strings, numbers, booleans, and null.

Task

Write a function that parses a JSON string and returns the equivalent Python object, returning None for invalid JSON.

Examples

Parse a JSON object

Input

parse_json('{"a": 1, "b": [1,2]}')

Output

{'a': 1, 'b': [1, 2]}

Explanation

A JSON object becomes a Python dict; arrays become lists.

Input format

A single argument: json_str (string) containing JSON.

Output format

Return the parsed Python object (dict/list/str/int/float/bool/None). Return None if input is not valid JSON.

Constraints

Do not use eval. Use Python's json module and handle JSONDecodeError. Keep behavior deterministic.

Samples

Sample input 0

parse_json('[1, 2, 3]')

Sample output 0

[1, 2, 3]

Explanation 0

A JSON array becomes a Python list.

Code editor

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03:42 PM

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