best practices for ValueError with custom JSON encoder in Python 3.10 when using Flask?
I've searched everywhere and can't find a clear answer... Quick question that's been bugging me - I'm running into a `ValueError` when trying to return a custom JSON response from my Flask application, specifically when I implement a custom JSON encoder... I have a class `MyClass` with properties that I want to serialize to JSON. Here's what I've done so far: ```python from flask import Flask, jsonify from flask.json import JSONEncoder app = Flask(__name__) class MyClass: def __init__(self, name, value): self.name = name self.value = value class MyCustomJSONEncoder(JSONEncoder): def default(self, obj): if isinstance(obj, MyClass): return {'name': obj.name, 'value': obj.value} return super().default(obj) app.json_encoder = MyCustomJSONEncoder @app.route('/data') def data(): my_object = MyClass('example', 42) return jsonify(my_object) ``` However, when I access the endpoint `/data`, I get the following behavior: ``` ValueError: The view function did not return a valid response. The response must be the same type as the return type of the view function or a valid response object. ``` I've verified that the custom JSON encoder is set up correctly, and it seems to be invoked, but the conversion isn't working as expected. I've tried changing how I'm returning the response, but nothing seems to resolve the scenario. I also checked the Flask documentation for details on response types but couldn't find anything that specifically addresses this scenario. Any insights on what might be going wrong or best practices for serializing custom objects in Flask would be greatly appreciated! Any ideas what could be causing this? My development environment is Linux. I'd really appreciate any guidance on this. I'm developing on CentOS with Python. Thanks for any help you can provide! I'm coming from a different tech stack and learning Python. The stack includes Python and several other technologies.