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

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

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?

# py executor
from Foundation import *
from AppKit import *

import imp
import sys
		
class MGSPythonScriptExecutor(NSObject):

	@classmethod
	def loadModuleAtPath_functionName_arguments_(self, path, func, args):
		f = open(path)
		try:
			theResult = None
			realfunc = None
			taskObject = None
			
			# load code at path as a module
			modBoo = imp.load_module('modBoo', f, path, (".py", "r", imp.PY_SOURCE))
			
			try:
				taskObject = modBoo.objBoo.alloc().init()
			except:
				taskObject = None
			
			# get function from object
			if taskObject is not None:
								
				# get function
				realfunc = getattr(taskObject, func, None)
			
			# get function from module
			if realfunc is None:
				# get function
				realfunc = getattr(modBoo, func, None)
			
			# if we have a function than call it
			if realfunc is not None:
			
				# call the function with our arguments
				# we make a tuple from our list and then unpack it
				theResult = realfunc(*tuple(args))
					
		except Exception:
			theResult = "exception in python script executor: ", sys.exc_info()
		except:
			theResult = "error in python script executor: ", sys.exc_info()
		finally:
			f.close()
		
		return theResult

Regards

Jonathan Mitchell

Developer
Mugginsoft LLP
http://www.mugginsoft.com