[Pyrex] dealing with objects of 2 classes

[Stefan Behnel]

Bartosz SKOWRON wrote:
> I have a new problem which I cannot find a solution.
> 
> Here is a very simple example:
> 
> cdef class a:
>     cdef foobar_t *foo
>     def __init__(self):
>            self.foo = extern_func1()
> 
> cdef class b:
>    cdef foobar_t *_foobar
>    def __init__(self, obja):
>            self._foobar = obja.foo
> 
> cdef class c:
>    def __init__(self, obja):
>            self._foobar = obja
> 
> 
> when i create new object of class b, `b(a())`  i get:
> AttributeError: 'a' object has no attribute 'foo'
> 
> when i create new object of class c, `c(a())`  i get:
> AttributeError: 'c' object has no attribute '_foobar'

You have to declare the variables that you assign the objects to, as in

	cdef b some_b
	some_b = b(a())
	print some_b.foo.some_struct_member

Otherwise, Pyrex cannot know what type they have, and that this type has
the above attributes.

Stefan