Speach utility

speach_utility.py

from zope.component import getGlobalSiteManager
from zope.interface import Interface, implements

#It's is common practice to prefix interfaces with a big "i".
class ISpeach(Interface): 
    def say(text):
        """Say something"""

class Hello: # Our utility
    #I promise that I implement ISpeach interface.
    implements(ISpeach)

    def say(self, name):
        print "Hello", name

# Getting the global registry
gsm = getGlobalSiteManager()
gsm.registerUtility(Hello())

# Let's use our utility. 
# Imagine that is somewhere else in your app.
my_utility = gsm.getUtility(ISpeach)
my_utility.say("Medved")