[Python-Dev] PEP 575 (Unifying function/method classes) update (original) (raw)

Stefan Behnel stefan_ml at behnel.de
Sun Jun 17 10:31:36 EDT 2018

Ronald Oussoren schrieb am 17.06.2018 um 14:50:

Why did you add a tpccalloffset slot to the type with the actual information in instances instead of storing the information in a slot?

If the configuration of the callable was in the type, you would need a separate type for each kind of callable. That would quickly explode. Think of this as a generalised PyCFunction interface to arbitrary callables. There is a function pointer and some meta data, and both are specific to an instance.

Also, there are usually only a limited number of callables around, so memory doesn't matter. (And memory usage would be a striking reason to have something in a type rather than an instance.)

Stefan

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