[Python-Dev] Strange behavior in Python 2.5a0 (trunk) --- possible error in AST?
Michael Hudson
mwh at python.net
Mon Mar 13 10:47:46 CET 2006
"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
> PyObject_SetItem
>
> 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 LOAD_CONST 0 (1)
3 LOAD_NAME 0 (mine)
6 LOAD_CONST 1 (Ellipsis)
9 LOAD_CONST 2 (None)
12 RETURN_VALUE
Cheers,
mwh
--
6. The code definitely is not portable - it will produce incorrect
results if run from the surface of Mars.
-- James Bonfield, http://www.ioccc.org/2000/rince.hint
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