>> It does seem a bit silly to actually be tracking that refcount :-)
Not that silly. It can easily help in C extensions to detect wrong DECREF calls: >> import ctypes >> non = ctypes.c_long.from_address(id(None)) >> non.value = 10 >> Fatal Python error: none_dealloc: deallocating None Python runtime state: finalizing (tstate=0x000055c66cf263f0) Current thread 0x00007f4afa383740 (most recent call first): <no Python frame> [1] 635685 abort (core dumped) python On 2021年12月16日 at 00:31, Christopher Barker <[email protected]> wrote: > On Wed, Dec 15, 2021 at 3:00 PM Guido van Rossum <[email protected]> wrote: > > >> who cares if the refcount for None is 5000 or 1610612736? As long as the >> refcount of *mortal* objects is the same as it was before, this shouldn't >> be a problem. >> > > indeed: > > $ python -c "import sys; print(sys.getrefcount(None))" > 4110 > > and a newly started iPython session: > > In [2]: sys.getrefcount(None) > Out[2]: 28491 > > It does seem a bit silly to actually be tracking that refcount :-) > > -CHB > > -- > Christopher Barker, PhD (Chris) > > Python Language Consulting > - Teaching > - Scientific Software Development > - Desktop GUI and Web Development > - wxPython, numpy, scipy, Cython > _______________________________________________ > Python-Dev mailing list -- [email protected] > To unsubscribe send an email to [email protected] > https://mail.python.org/mailman3/lists/python-dev.python.org/ > Message archived at > https://mail.python.org/archives/list/[email protected]/message/36N4I4CJ53OR3CLDJSJUIXEAS3NIFURP/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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