Blog post test

example1.py

def notify(msg):
    print "NOTIFY: {}".format(msg)

def process():
    #...
    notify = False
    if notify:
        # take action
        print "processing!"
    #...

example2.py

def expensive(foo):
    if not hasattr(expensive, "_cached"):
        expensive._cached = process_expensive_computation()
    return epensive._cached

example2.rb

def expensive()
  @expensive ||= process_expensive_computation()
end