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On Thu, Dec 14, 2017 at 7:03 PM, Guido van Rossum <guido@python.org> wrote:
My motivation to add the slot wasn't the performance: it's just not
possible to have a class-level \_\_getitem\_\_ on types defined in C. The
only way is to define a base class in C and then extend it in
pure-Python. This isn't too hard usually, though.