class KeyListener:
    def key_pressed(self, key):
        """
        A key has been pressed

        :param int: ASCII code of the key
        """
        pass

    def key_released(self):
        """
        No key is pressed
        """

    def left_pressed(self):
        pass

    def right_pressed(self):
        pass

    def up_pressed(self):
        pass

    def down_pressed(self):
        pass

    def escape_pressed(self):
        pass

    def space_pressed(self):
        pass

    def enter_pressed(self):
        pass

    def minus_pressed(self):
        pass

    def number_pressed(self, number):
        pass
