'Returns the value of the argument with the given name.
If default is not provided, the argument is considered to be
required, and we raise a `MissingArgumentError` if it is missing.
If the argument appears in the url more than once, we return the
last value.
The returned value is always unicode.'

def get_argument(self, name, default=_ARG_DEFAULT, strip=True):

    return self._get_argument(name, default, self.request.arguments, strip)
