On Thu, Aug 4, 2016 at 6:53 AM, BartC <b...@freeuk.com> wrote: > On 03/08/2016 21:12, Chris Angelico wrote: >> >> Fairly common approach - and it means you'll never find those .py >> files. So it's no different from looking for sys.py and not finding >> it, except that in the case of CPython's sys, it's not even a DLL - >> it's part of the interpreter core. > > > I don't understand. With direct access to msvcrt.dll, the interface to that > will be inside a .py file. Not buried away somewhere else.
Oh. CPython takes a much simpler approach: instead of forcing a Python module to "think like C", it allows a C module to export functions to Python. So when you "import math", you actually get something from a .so/.dll file. I've no idea how Jython does this; it appears that math.__file__ is AttributeError. Ditto PyPy. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
