[Python-Dev] switching on -3 from within a program? (original) (raw)
Nick Coghlan ncoghlan at gmail.com
Wed Sep 17 12:06:18 CEST 2008
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Benjamin Peterson wrote:
def engagepy3kwarning(): flag = ctypes.cint.indll(ctypes.pythonapi, "PyPy3kWarningFlag") flag.value = 1
Note that tricks like this won't necessarily enable all python 3 warnings for modules that have been imported before the flag gets set. To avoid unnecessary performance penalties as a result of Py3k warnings, modules are permitted to do things like:
def func():
Do whatever
if sys.py3kwarning: _orig_func = func def func(): warnings.py3kwarn("Goes away in 3.0") _orig_func()
Modules that are first imported after the flag has been set will obviously have all of their warnings properly enabled.
Cheers, Nick.
-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia
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