def set_gamma_value(self, value):
        '''
        setter
        Gamma value.
        '''
        if isinstance(value, float) is False:
            raise TypeError("The type of __gamma_value must be float.")
        self.__gamma_value = value
def set_gamma_value ( self , value ) : if isinstance ( value , float ) is False : raise TypeError ( "The type of __gamma_value must be float." ) self . __gamma_value = value
setter
        Gamma value.