Simple retries in Python

retries.py

def retries(num_retries):
    """
    Generates a sequence of retry attempt objects, helping you write nicer retry code:

    Example usage:
      for retry in retries(num_retries):
          if not retry.first:
              logging.debug("Retrying...")
          try:
              some_operation()
          except PossibleException:
              if retry.last:
                  raise

    """
    return (RetryAttempt(i, num_retries) for i in xrange(num_retries))

class RetryAttempt(object):
    def __init__(self, retry_number, total_retries):
        super(RetryAttempt, self).__init__()
        self.retry_number0 = retry_number
        self.retry_number1 = retry_number + 1
        self.first = (retry_number == 0)
        self.last = (retry_number == total_retries - 1)