[C++-sig] call python iterable (handle StopIteration?)

[Neal Becker]

François Duranleau wrote:

> On Tue, 17 Jul 2007, Neal Becker wrote:
> 
>> I want to call a python iterable from c++.  Can I do this?
>>  while (true) {
>>    T n = extract<T> (o.attr ("next")());
>>    tmp.push_back (n);
>>  }
>>
>> How do I (can I?) catch the StopIteration exception?
> 
> You can also try to use boost::python::stl_input_iterator (from 1.34),
> e.g.:
> 
> // here it assumed that the object o is not the iterator object itself but
> // the iterable objet, that is, an object with a method __iter__
> for( stl_input_iterator< T > begin( o ) , end ;
>       begin != end ;
>       ++ begin )
> {
>      tmp.push_back( * begin ) ;
> }
> 
> or
> 
> std::copy( stl_input_iterator< T >( o ) ,
>             stl_input_iterator< T >() ,
>             std::back_inserter( tmp ) ) ;
> 
> For more info: http://www.boost.org/libs/python/doc/v2/stl_iterator.html
> 

Nice!