In Python, I want to have an enum-like data structure that can be used like the Option enum in Rust: the enum has parameterized member, and an unparameterized, e.g.,

enum MyType<T> {
    A,
    B(T),
}

would allow me to use MyType.A, MyType.B(1) and MyType.B(2).

What is the most elegant way to achieve this behavior in Python? So far, my only solution would involve subclasses A, B of an abstract class MyType. But the drawback is that this requires me to do instance checking instead of simply using is.

My specific use case is the following: My data can be either replicated across multiple processes or sharded. If it’s sharded, I need the number of shards. My function will process data depending on whether it’s replicated or sharded.

If enums aren’t useful for this, how to better implement this?