I’m toying with the idea of creating a fixed length list. I don’t mean only intialising, but setting it so you can’t change the length.

It seems that I might be able to create a sub class and disable the dunder functions which change the size of the list. Something like this:

class FixedList(list):
    #   disable __append__ etc

data = FixedList(['apple','banana','cherry','donut','etc']

I’ve tried:

class FixedList(list):
    def __append__(self):
        pass

but that doesn’t work — I can still append a new value.

Is it possible to disable a dunder function like this? (If somebody wants to suggest a better way of doing this, I’m listening …)