Unexpected AttributeError when using custom class instances in Python 3.10
I'm having a hard time understanding I'm migrating some code and I'm learning this framework and I'm stuck on something that should probably be simple... I'm working with an `AttributeError` when trying to call a method on an instance of a custom class in Python 3.10. I have a simple class structure where I define a base class and a derived class. Here's the relevant code snippet: ```python class Base: def __init__(self, name): self.name = name class Derived(Base): def greet(self): print(f'Hello, {self.name}!') instance = Derived('Alice') instance.greet() ``` This works perfectly, and I can see 'Hello, Alice!' printed as expected. However, when I try to create a list of `Derived` instances and call `greet` on each one, I get an `AttributeError`: ```python instances = [Derived(name) for name in ['Alice', 'Bob', 'Charlie']] for instance in instances: instance.greet() ``` The behavior message is as follows: ``` AttributeError: 'Derived' object has no attribute 'greet' ``` I double-checked that I'm not misplacing or overriding the `greet` method in any of the instances. I also made sure that the `Derived` class is correctly defined in the same module. What could be causing this behavior? Is it possible that there's an scenario with how Python is handling the class definitions in this context? I've tried restarting my Python environment and even running this in a different IDE, but the scenario continues. Any insights would be greatly appreciated! For context: I'm using Python on macOS. Has anyone else encountered this? For reference, this is a production microservice. Is there a simpler solution I'm overlooking? I'm working in a Windows 10 environment. Thanks for any help you can provide! This is happening in both development and production on macOS. What would be the recommended way to handle this? My team is using Python for this CLI tool. Is there a better approach?