Re: [Pyobjc-dev] Class OC_PythonObject: no such selector: _cfTypeID

[<jon...@mu...>]

On 11 Jun 2010, at 04:45, Ronald Oussoren wrote:

> 
> On 10 Jun, 2010, at 15:16, jon...@mu... wrote:
> 
>> My ObjC app loads user generated PyObjC scripts using a Python NSObject subclass (see below)
>> In general, errors in the Python scripts are generating application level exceptions.
>> 
>> For instance, consider the following source file Boo.py.
>> 
>> def funcBoo():
>> 	return result
>> 
>> Dynamically loading Boo.py and calling funcBoo using the class  below generates an ObjC NSException in the host app:
>> Class OC_PythonObject: no such selector: _cfTypeID
>> 
>> Assigning a value to the result variable resolves the problem.
>> 
>> Is there a way of determining or reporting the underlying Python issue that is causing the NSException?
> 
> Ensure that the following gets called somewhere:
> 
> import objc; objc.setVerbose(1)
> 
> After that PyObjC will log all exceptions when they get translated from Python to ObjC.
> 
> That said, the exception that you are getting is not what I'd expect.  I'll have to create a standalone application using your launcher to check what's going on here.
> 
> Ronald
Thanks.

That helped me get to the bottom of the problem.
The faulty Python was in fact generating a Python exception in the loader.

My ObjC host app couldn't live with the tuple proxy class that the loader returned as a result of the Python exception.
This was the source of the ObjC exception, not PyObjC itself.