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In cxx_extensions.cxx

extern "C" PyObject *getattro_handler( PyObject *self, PyObject *name )
{
    try
    {
        PythonExtensionBase *p = getPythonExtensionBase( self );
        return new_reference_to( p->getattro( Py::String( name ) ) );
    }
    catch( Py::Exception &)
    {
        return NULL;    // indicate error
    }
}

In a derived class this always call the getattro of the base class, and
never get the derived class attributes visible.
How can I access a derived class attro?

I've attached the test system, base.h and base.cxx.
When compiled, it is possible to create a g = base.Gain("b",1,None,2.43)
object, and access name,number and parent attributes, but doesn't reach the
gain attribute.
Python says
"""Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'Gain' object has no attribute 'gain'
"""

It would be possible to call first the derived class method, and inside it
call the base class method (under the user responsibility)?

-- 
Fernando Libonati
fernando.libonati at gmail.com

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In cxx_extensions.cxx<br><br>extern &quot;C&quot; PyObject *getattro_handle=
r( PyObject *self, PyObject *name )<br>{<br>=A0=A0=A0 try<br>=A0=A0=A0 {<br=
>=A0=A0=A0=A0=A0=A0=A0 PythonExtensionBase *p =3D getPythonExtensionBase( s=
elf );<br>=A0=A0=A0=A0=A0=A0=A0 return new_reference_to( p-&gt;getattro( Py=
::String( name ) ) );<br>
=A0=A0=A0 }<br>=A0=A0=A0 catch( Py::Exception &amp;)<br>=A0=A0=A0 {<br>=A0=
=A0=A0=A0=A0=A0=A0 return NULL;=A0=A0=A0 // indicate error<br>=A0=A0=A0 }<b=
r>}<br><br>In a derived class this always call the getattro of the base cla=
ss, and never get the derived class attributes visible.<br>
How can I access a derived class attro?<br><br>I&#39;ve attached the test s=
ystem, base.h and base.cxx.<br>When compiled, it is possible to create a g =
=3D base.Gain(&quot;b&quot;,1,None,2.43) object, and access name,number and=
 parent attributes, but doesn&#39;t reach the gain attribute.<br>
Python says<br>&quot;&quot;&quot;Traceback (most recent call last):<br>=A0 =
File &quot;&lt;stdin&gt;&quot;, line 1, in &lt;module&gt;<br>AttributeError=
: &#39;Gain&#39; object has no attribute &#39;gain&#39;<br>&quot;&quot;&quo=
t;<br>
<br>It would be possible to call first the derived class method, and inside=
 it call the base class method (under the user responsibility)?<br><br>-- <=
br>Fernando Libonati<br>fernando.libonati at <a href=3D"http://gmail.com">g=
mail.com</a><br>


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