> On 9 Dec 2019, at 18:31, Andrew Barnert via Python-ideas > <python-ideas@python.org> wrote: > > On Dec 8, 2019, at 22:01, Tim Peters <tim.pet...@gmail.com> wrote: >> >> BTW, another change I'd make is to break the tradition of coding every >> itertools function in C. That makes the implementation bar much >> higher, and the other similar packages (more_itertools, >> toolz.itertools) don't bother. There's also that pypy has trouble >> optimizing code using itertools heavily, _because_ it's written in C >> instead of Python. > > Didn’t PyPy already make the fix years ago of rewriting all of itertools (for > both 2.7 and 3.3 or whenever) as “Python builtins” in the underlying > namespace? > > Also, even if I’m remembering wrong, just writing a Python module in front of > the C module, with most of the functions still being C-only, wouldn’t help > PyPy. You’d still need to port every function to Python (and be aware that > the “equivalent code” in the help is usually only a rough equivalent with > subtle differences, so you’d have to spot, fix, and write unit tests for all > of those), with the C only an optional accelerator, a la PEP 399 (the > requirements for C accelerators in newly-added modules). > > Which is far from impossible, it’s just more work than it seems like anyone’s > ever been willing to do each time it comes up (and you’re right, it comes up > every time a new potentially useful itertools tool is proposed…). If someone > cares about first enough to finally do that, I’m +1 on the proposal instead > of 0.
This is a perfect case for mutation testing! Just pip install mutmut; mutmut run. I'm willing to do the test suite if there's a python implementation. _______________________________________________ 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/LHKTUE746Z6FPQU2NXAZLWEPK6DYFAOB/ Code of Conduct: http://python.org/psf/codeofconduct/
