Does Python really follow its philosophy of "Readability counts"?
tjreedy at udel.edu
Fri Jan 16 11:24:15 CET 2009
Paul Rubin wrote:
> Terry Reedy <tjreedy at udel.edu> writes:
>>>> Have you looked at Tim Sweeney's talk that I mentioned in another post?
>> I did. He gives a really nice use case for Python's ability to
>> dynamically modify classes imported from a library. (Were not you
>> arguing against that? Or was is someone else?)
> He is talking about extending classes by something like inheritance,
> not modifying them dynamically. This is also in the context of an
> extremely powerful static type system with existential and dependent
> types, and totality proofs for just about everything. That is about a
> billion light years away from anything anyone has ever proposed for
If the library framework were written in Python, one would have a choice
between creating a parallel class hierachy (through inheritance) that
dupicates *every* class in the original hierachy and dynamically
patching just those classes that need to be changed. He only discussed
the former option because that was the only one available. If, for
instance, one only needed to change the base class, patching just that
would be much easier. Hence my comment.
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