> Probably os.execv() should be implemented on Windows with _wexecv()
> instead of _execv().  Likewise for other functions which have "wide"
> versions.  Or maybe it wouldn't be worth the effort, since it would
> mean writing separate Windows implementations.

Writing separate Windows versions has a long tradition in posixmodule.c,
so in principle it's fine. It still may not be worth the effort since
the function is deprecated in favor of the subprocess module. However,
if code was contributed in that direction, we would likely accept it.