On Mon, Feb 11, 2019 at 2:21 AM Jon Ribbens <jon+use...@unequivocal.eu> wrote: > > On 2019-02-09, Terry Reedy <tjre...@udel.edu> wrote: > > '/' is no uglier than, and directly analogous to, and as easy to produce > > and comprehend, as '*'. It was selected after considerable discussion > > of how to indicate that certain parameters are, at least in CPython, > > positional only. The discussion of options included at least some of > > those given above. It is very unlikely to go away or be changed. > > Ok, but what does it *mean*?
It means "everything prior to this point is positional-only". > As an aside, how is 'math.sin' actually implemented? mathmodule.c > refers to the function 'math_sin' but that name is not defined > anywhere in the Python source code. I'm a bit mystified as to how > CPython manages to compile! A lot of those sorts of functions are hyperthin wrappers around the C math library. A bit of digging takes me to line 1176 of mathmodule.c (in my source tree; exact line number may vary), which uses the #define of FUNC1 from line 1032, and the actual code is up at line 876, with a good block comment. ChrisA -- https://mail.python.org/mailman/listinfo/python-list