def _angleValueRepr(self):
        """
        Returns a string representation of the angular value of this angle.

        This is a helper function for the actual C{__repr__}.

        @return: The string representation.
        @rtype: C{str}
        """
        if self.inDecimalDegrees is not None:
            return "%s degrees" % round(self.inDecimalDegrees, 2)
        else:
            return "unknown value"

        Returns a string representation of the angular value of this angle.

        This is a helper function for the actual C{__repr__}.

        @return: The string representation.
        @rtype: C{str}
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/positioning/base.py