👀 Views: 82 💬 Answers: 1 📅 Created: 2025-07-14

json python deserialization Python

I'm collaborating on a project where I'm sure I'm missing something obvious here, but I'm working with an unexpected scenario while trying to parse a JSON string with duplicate keys using Python's built-in `json` module. My JSON data looks like this: ```json {"name": "John", "name": "Doe", "age": 30} ``` When I use `json.loads()` to deserialize this string, I'm seeing that it only retains the last occurrence of the duplicate key. Here’s the code I’m using: ```python import json json_data = '{"name": "John", "name": "Doe", "age": 30}' parsed_data = json.loads(json_data) print(parsed_data) ``` The output I get is: ```python {'name': 'Doe', 'age': 30} ``` I expected it to keep both names or at least throw an behavior. I’ve read that JSON should not have duplicate keys, but I need to handle such cases gracefully. I've tried switching to the `simplejson` library, but it exhibits the same behavior. What would be the best approach to manage this kind of JSON data where duplicate keys can occur? Should I preprocess the string to handle duplicates, or is there a library that can help with this? Any insights would be greatly appreciated! I'm developing on Windows 11 with Python. Could someone point me to the right documentation? This is happening in both development and production on Debian. I'd love to hear your thoughts on this.