Yury Selivanov wrote: > On Thu, Jun 6, 2019 at 5:20 PM Christoph Groth <christ...@grothesque.org> > wrote: > [..] > > The other possibility I see would be wrapping ContextVar inside a > > class (like in the example module that I attached to the first post > > in this thread), but that's not a good solution. It requires > > replicating the complete API, and is hence slow and not > > forward-compatible. > > Wrapping isn't much slower than subclassing and calling super(). > (...)
What is actually the reason that Py_TPFLAGS_BASETYPE is not set for ContextVar (and many other built-in types)? The performance penality cannot be significant since both tuple and list are subclassable. Does it complicate the implementation? The requirements [1] do not look bad. Am I missing anything obvious here? (The extension types that I wrote are also not subclassable, but I just followed the default here and so far no one complained.) [1] https://www.python.org/dev/peps/pep-0253/#preparing-a-type-for-subtyping _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/MRVOLJVSK5D3KNW373UDGIF3H4DI3UAF/ Code of Conduct: http://python.org/psf/codeofconduct/
