Re: [Swig-user] Returned Value Can't be Read Correctly

[Stefan Z. <sz...@gm...>]

You need to use a %template directive in your swig interface file; something
like this:

%template(MyObjectMap) std::map<MyObject*, MyObject*>;
%template(MyObjectMapVector) std::vector< std::map<MyObject*, MyObject*> >;

Take a look at the SWIG docs for more info:

http://www.swig.org/Doc2.0/SWIGPlus.html#SWIGPlus_nn30

Stefan

On Thu, Jun 23, 2011 at 1:02 AM, Zhenguo Wang <wan...@gm...> wrote:

> Hello all,
>
> We are wrapping C++ into Python via Swig, one of our function is declare as
> below:
> std::vector<std::map<MyObject*, MyObject*>*>& Search()
>
> In Python, the function is called correctly, but we can't print out
> returned value.
>
> 1. To print the first element:
> *>>> result[0]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> TypeError: 'SwigPyObject' object is unsubscriptable*
>
> 2. To print the object directly:
> *>>> print result
> <Swig Object of type 'std::vector< std::map< MyObject *,MyObject
> *,std::less< MyObject * >,s
> td::allocator< std::pair< MyObject *const,MyObject * > > >
> *,std::allocator< std::map<
> MyObject *,MyObject *,std::less< MyObject * >,std::allocator< std::pair<
> MyObject *const,MyObject * >
>  > > * > > *' at 0x00BEE298>*
>
>
> In the wrapper code, the returned value been wrappered by
> SWIG_NewPointerObj() with the type swig_types[124].
>
>
> Does anyone have experience on such kind of issue?
>
> It's appreciative if any suggestion!
>
> We are using Swig 2.0 and Python 2.5.
>
>
> Thanks in advance!
>
> Zhenguo Wang
>
>
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