C API PyErr_Clear vs PyObject_HasAttrString

[Andrew MacIntyre]

On Sun, 28 Nov 2004, Robin Becker wrote:

> > I had a look at the source (from a CVS checkout this morning), and the
> > only thing that looks like a source of such trouble would be an extension
> > class with a tp_getattr implementation.
>
> It is such a beast, but the exciting test case looks like
>
> #####################
> import _test
> g=_test.gstate()
>
> for a in ('strokeColor','strokeColor'):
> 	try:
> 		setattr(g,a,(1,2,3))
> 		print 'Wrong handling of bad '+a
> 	except ValueError:
> 		pass
> #####################
>
> so the tp_getattr slot isn't being used.

Referring to the original C code you posted, PyObject_HasAttrString() will
call the tp_getattr routine, clearing any exceptions raised as it returns.

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