Fwd: Derived class getattro

[Fernando L. <fer...@gm...>]

A few minutes after this post, I've realized that Block::init_type() must be
called in module initialization, and not in Gain::init_type(), but the same
thing happens.

Fernando

---------- Forwarded message ----------
From: Fernando Libonati <fer...@gm...>
Date: 2010/4/10
Subject: Derived class getattro
To: Discuss PyCXX use and improvement <cxx...@li...>


In cxx_extensions.cxx

....

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



-- 
Fernando Libonati
fernando.libonati at gmail.com