On 15 December 2017 at 18:40, Serhiy Storchaka <storch...@gmail.com> wrote:
> 15.12.17 19:04, Ivan Levkivskyi пише: > >> Good point! Pure Python will be the primary use case and we have another >> precedent >> for "automatic" class method: __init_subclass__ (it does not need to be >> decorated). >> > > __init_subclass__ is very different beast, and parallels with it can be > confusing. It is automatically decorated with classmethod if it is a > regular function implemented in C. The following two examples are totally > equivalent: > > class A: > def __init_subclass__(cls): pass > > class B: > @classmethod > def __init_subclass__(cls): pass > > help(A) shows __init_subclass__() as a class method (in 3.7). > > But if you implement the class in C you need to make __init_subclass__ a > class method. > > I think __init_subclass__ should be documented as a class method since it > is a class method. > Thank you for clarification! Actually documentation https://docs.python.org/3.6/reference/datamodel.html#customizing-class-creation already says `classmethod object.__init_subclass__(cls)` I am not an expert in this, so I am not sure if the docs can be improved here (maybe we can add how this works with C API?) -- Ivan
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