Thomas,

I think the answer is here:
http://www.boost.org/doc/libs/1_40_0/libs/python/doc/tutorial/doc/html/python/iterators.html

but you should modify your "Garden" class in order to support "begin"
and "end" iterators for "tomatoes" and "potatoes".

With these modifications:

class Garden {
public:
  typedef ....      Tomato_Iter;
  typedef ....      Potato_Iter;

  Tomato_Iter   tomatoes_begin();
  Tomato_Iter   tomatoes_end();
  Potato_Iter   potatoes_begin();
  Potato_Iter   potatoes_end();
};

you can expose your Garden class as here:

class_<Garden> ("Garden")
    .property("tomatoes", range(&Garden::tomatoes_begin, &Garden::tomatoes_end))
    .property("potatoes", range(&Garden::potatoes_begin,
&Garden::potatoes_end));

At this point, in Python, you should be able to write:

for potato in garden.potatoes:
   .... and do here whatever you want ...

It's the best I can suggest


2009/11/6 Thomas Daniel <thomasd57@[...].com> :
>  I am having trouble wrapping a container that can hold multiple object types
>  and therefore has multiple iterator types.
> 
>  My C++ library has these classes:
> 
>  class Tomato;
>  class Potato;
>  class Garden {
>    Iter<Tomato>   get_tomatoes();
>    Iter<Potato>   get_potatoes();
>  };
> 
>  template<class T>
>  class Iter {
>    T get_next();
>  };
> 
>  which allows to write:
> 
>  Iter<Potato> potatoes = garden.get_potatoes();
>  while (Potato potato = potatoes.get_next()) {
>   cout << potato.name();
>  }
> 
>  I am trying to use boost to wrap it so that I can write in python:
> 
>  for potato in garden.get_potatoes():
>   print potato.name()
> 
>  Any pointers how to achieve this with boost?
> 
> 
> 
> 
> 
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-- 
Michele De Stefano
http://www.linkedin.com/in/micdestefano
http://xoomer.virgilio.it/michele_de_stefano
http://code.google.com/p/mds-utils
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