Perform a Yelp Neighborhood API Search based on a location specifier.

        Args:
          location - textual location specifier of form: "address, city, state or zip, optional country"
          cc       - ISO 3166-1 alpha-2 country code. (Optional)

def by_location(self, location, cc=None):
        """
        Perform a Yelp Neighborhood API Search based on a location specifier.

        Args:
          location - textual location specifier of form: "address, city, state or zip, optional country"
          cc       - ISO 3166-1 alpha-2 country code. (Optional)
        """

        header, content = self._http_request(self.BASE_URL, location=location, cc=cc)		
        return json.loads(content)