On Wednesday, 22 March 2017 18:48:15 UTC+1, Aaron Meurer wrote:
>
>
> How would it work as a set? How do you know which function to call? 
>
>
I was thinking about something like this:


class Add:
    _check_postprocess = False

    @classmethod
    def flatten(cls, seq):
        postprocess = set([])
        if cls._check_postprocess:
            for i in seq:
                if hasattr(i, "_postprocess_function_Add"):
                    postprocess.add(i._postprocess_function_Add)
        
        [ ... body of flatten ... ]
        [ call `expr` the returning expression ]

        for i in postprocess:
            expr = i(expr)
        return expr

 

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