What are the best practices for using data classes in Python?

What are the best practices for using data classes in Python?

When using data classes in Python, it's best to keep them simple, use type annotations, and avoid mutable default values.

Can you explain why mutable default values are a problem?

Mutable default values can lead to unexpected behavior because they are shared across all instances of the class.

What about using __post_init__? When should I use it?

You should use __post_init__ for any initialization that requires logic beyond simple assignment, like validation.

Are there any performance considerations I should be aware of?

Data classes are generally efficient, but if you have many fields or complex types, consider the overhead of automatic methods.