String formatting with % is the oldschool way of doing things.  I think that moving forward we want to be using the new curly-brace string formatting instead.  This line could be re-written as `href = "{0}/{1}?limit=100".format(self._tenant, self.SECRETS_PATH)"`  See [format examples](http://docs.python.org/2/library/string.html#format-examples) for more info.