Is it possible to have Python IDEs offer autocompletion for dynamically generated class attributes?

Are there any tricks I can employ to get IDEs to offer code completion for dynamically generated class attributes? For instance

class A:
    
    def __init__(self):
        setattr(self, "a", 5)

This code will set the class attribute of A called a to the value of 5. But IDEs do not know about a and therefore you do not get code completion for it. I've read that the __dir__ method can be hooked, but the suggestion made in that answer has not worked for me. Does anybody have any ideas?

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