Re: [Swig-user] TypeError Python <-> C++

[Alberchou <tun...@ho...>]

Well, I have modified my C++ function just to try if it works only with an
"int" parameter --- function(int param);

It doesn't give me the same error that I've told before but it crashes while
executing this:

# In python

rutaResultado = Ejecutor.ejecutarBusqueda(cNumVehiculos)

ejecutarBusqueda(int) is the function at C++.

It gives me the following error:

Assertion failed: (_flags & F_lock_count) != 0 at line 68 of
c:\buildslave\release_sdk_win32\build\panda3d\built\include\mutexSimpleImpl.I

And a windows message: "python.exe stopped working" with these details:

  Problem name:				APPCRASH
  Application name:			python.exe
  Module name with errors:		ntdll.dll
  Version of the module with errors:	6.1.7600.16915
  Exception code:			        c0000005


My python version is 2.6.5 and I'm running it with Panda3D libraries for
programing 3D games.

Please, I need urgent help, I'm wasting too much time with this :(. Thank
you so much!


Bob Hood wrote:
> 
> On 5/21/2012 5:34 AM, Alberchou wrote:
>> Hi everybody,
>>
>> I have a problem. At C++ I have this: string ejecutarBusqueda(int
>> cantidad,
>> string vehiculos);
>>
>> When I try to execute that C++ method from Python, it throws this error
>> message:
>>
>>   File "C:\Panda3D-1.7.2\samples\PFC\Interfaz.py", line 185, in
>> resolverTablero 
>>      rutaResultado = Ejecutor.ejecutarBusqueda(cNumVehiculos, cVehiculos)
>> TypeError: in method 'ejecutarBusqueda', argument 2 of type 'string'
>>
>> I don't understand why it throws this error when I'm calling C++ method
>> with
>> (int, string) parameters...
>>
>> Could you tell me what happens?
> 
> Just guessing, but perhaps you need to convert between an incoming Python
> string and your target type of std::string?  Something like:
> 
>    %typemap(in) std::string
>    {
>         if(PyString_Check($input))
>             $1 = PyString_AsString($input);
>         else
>             SWIG_exception_fail(SWIG_TypeError, "string expected");
>    }
> 
> Or there may be helpers in the SWIG library (e.g., "%include
> <std_string.i>")
> that could do the job for you if you don't want to roll your own typemaps.
> 
> 
> Render me gone,                       |||
> Bob                                 ^(===)^
> ---------------------------------oOO--(_)--OOo---------------------------------
>     I'm not so good with advice...can I interest you in a sarcastic
> comment?
> 
> 
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