handle.py

from zope.app import zapi
from quota.interfaces import IQuota
from zope.component import ComponentLookupError
 
def handleAdded(object,event) :
    try :
        zapi.getUtility(IQuota, context=object).handleAdded(event.object)  
    except ComponentLookupError :
        pass

def handleModified(object,event) :
    try :
        zapi.getUtility(IQuota, context=object).handleModified(event.object)  
    except ComponentLookupError :
        pass

def handleRemoved(object,event) :
    try :
        zapi.getUtility(IQuota, context=object).handleRemoved(event.object)  
    except ComponentLookupError:
        pass