[Python-Dev] Making None a keyword (original) (raw)

Jeremy Hylton jeremy@zope.com
Fri, 26 Apr 2002 12:23:34 -0400

"GN" == Gustavo Niemeyer <niemeyer@conectiva.com> writes:

Note too that we can't change the generated code at all for 2.3 unless under the control of a new future statement, else existing None-abusing code could break.

GN> I'm trying to eat the cake and have it too, by detecting if None GN> is being abused and disabling the change of LOAD_GLOBAL to GN> LOAD_CONST. If it works (and probably will), we may then choose GN> to include warnings, keep it that way forever, or whatever.

This can't be detected statically, because a global could be introduced dynamically:

foo.py:

def f(): return None

import foo foo.None = 12 foo.f() 12

Jeremy