fancy decorator

gistfile1.py

def retry_with_backoff(success_func, backoff_rate=2, checkback_time=1):
  def wrap(f):
    def new_function(*args, **kw):
      try:
        f(*args, **kw)
        try_in(checkback_time, retry, [checkback_time, args, kw])
      finally:
        pass 

    def retry(delay, args, kw):
      if success_func(*args, **kw):
        f(*args, **kw)
        try_in(delay, retry, [delay*backoff_rate, args, kw])
    return new_function
  return wrap

def try_in(t, f, args=[], kw={}):
  Timer(t, f, args, kw).start()