Returns the value of the argument with the given name.

        If default is not provided, returns ``None``

        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=None, strip=True):
        """
        Returns the value of the argument with the given name.

        If default is not provided, returns ``None``

        If the argument appears in the url more than once, we return the last value.

        The returned value is always unicode
        """
        return self._get_argument(name, default, self.request.arguments, strip)[name]