On Mon, Nov 6, 2017 at 3:18 PM, Chris Barker <chris.bar...@noaa.gov> wrote:
> Klunky, and maybe we could come up with a standard way to do it and > include that in numpy, but I'm not sure that ABCs are the way to do it. > ABCs are *absolutely* the way to go about it. It's the only way baked into the Python language itself that allows you to register a class for purposes of `isinstance` without needing to subclass--i.e. duck-typing. What's needed, though, is not just a single ABC. Some thought and design needs to go into segmenting the ndarray API to declare certain behaviors, just like was done for collections: https://docs.python.org/3/library/collections.abc.html You don't just have a single ABC declaring a collection, but rather "I am a mapping" or "I am a mutable sequence". It's more of a pain for developers to properly specify things, but this is not a bad thing to actually give code some thought. Ryan -- Ryan May
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