(self)
return self.owner is not None
Determines if the planet has an owner.
        :return: True if owned, False otherwise
        :rtype: bool
Determines if the planet has an owner.
        :return: True if owned, False otherwise
        :rtype: bool
Determines if the planet has an owner . : return : True if owned False otherwise : rtype : bool
def is_owned(self):
        """
        Determines if the planet has an owner.
        :return: True if owned, False otherwise
        :rtype: bool
        """
        return self.owner is not None
def is_owned ( self ) : return self . owner is not None