[Python-Dev] Strange behavior in Python 2.5a0 (trunk) --- possible error in AST? (original) (raw)
Nick Coghlan ncoghlan at gmail.com
Mon Mar 13 13:11:38 CET 2006
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Michael Hudson wrote:
"Travis E. Oliphant" <oliphant.travis at ieee.org> writes:
I'm seeing strange behavior in the Python 2.5a0 trunk that is causing the tests for numpy to fail. Apparently obj[...] = 1 is not calling PyObjectSetItem
Here is a minimal example to show the error. Does anyone else see this? class temp(object): def setitem(self, obj, v): print obj, v mine = temp() mine[...] = 1 It's a compiler problem:
dis.dis(compile("mine[...] = 1", '', 'single')) 1 0 LOADCONST 0 (1) 3 LOADNAME 0 (mine) 6 LOADCONST 1 (Ellipsis) 9 LOADCONST 2 (None) 12 RETURNVALUE
And how...
case Ellipsis_kind: ADDOP_O(c, LOAD_CONST, Py_Ellipsis, consts) break;
Just a couple of minor details missing, like, oh, compiling the actual subscript operation :)
Bug here: http://www.python.org/sf/1448804
(assigned to myself, since I already wrote a test for it and worked out where to fix it)
Cheers, Nick.
-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia
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