[Pyobjc-dev] Method Swizzling - class_getInstanceMethod

[Saptarshi G. <sap...@gm...>]

Hello,
How exactly do I use this function? For example,

This is a plugin in Python(Leopard 10.5.5), the principal class is  
Voo(see end of email).
I load the bundle and  instantiate it like this

NSBundle *bun=[NSBundle bundleWithPath:@"/Users/yanger/toperuse/PyRu/ 
example2/dist/gigo.plugin"];
Class currPrincipalClass = [bun principalClass];
id ins=[[currPrincipalClass alloc] init];	

(i'm basing this of PyRu)
Voo is trying to swizzle goody method I added to PythonStuff.
However,
a) load is not run
b)  <type 'exceptions.AttributeError'>: 'module' object has no  
attribute 'class_getInstanceMethod'

Any ideas what I should do?
Thanks
Saptarshi


==Python Bundle(gigo.py)==
from Foundation import *
from AppKit import *
from Foundation import *
import objc

class PythonStuff(objc.Category(PythonStuff)):
     def mygoody(self):
         NSLog("Alpha betea")

class Voo(NSObject):
     @classmethod
     def load(cls):
         NSLog("A")
     def init(self):
         super(Voo, self).init()
         NSLog("B:")
         originalMethod  =  
objc.class_getInstanceMethod(objc.lookUpClass(u"PythonStuff"), "goody")
         replacedMethod  =  
objc.class_getInstanceMethod(objc.lookUpClass(u"PythonStuff"),  
"mygoody")
         objc.method_exchangeImplementations(originalMethod,  
replacedMethod)	
         NSLog("C:")
         return self

==setup.py==
from distutils.core import setup
import py2app
plist = dict(NSPrincipalClass='Voo')

setup(
     plugin = ['gigo.py'],
     options=dict(py2app=dict(extension='.plugin', plist=plist))
)