def get_value(self):
        """Returns the value of the constant."""
        if self.value is not_computed:
            self.value = self.value_provider()
            if self.value is not_computed:
                return None
        return self.value
def get_value ( self ) : if self . value is not_computed : self . value = self . value_provider ( ) if self . value is not_computed : return None return self . value
Returns the value of the constant.