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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def act(self, action):
 """ Take one action for one step """

        # FIXME: Hack to change in return type
        action = int(action)
        assert isinstance(action, int)
        assert action < self.actions_num, "%r (%s) invalid"%(action, type(action))

        # Reset buttons
        for k in self.world_layer.buttons:
            self.world_layer.buttons[k] = 0

        # Apply each button defined in action config
        for key in self.world_layer.player.controls[action]:
            if key in self.world_layer.buttons:
                self.world_layer.buttons[key] = 1

        # Act in the environment
        self.step()

        observation = self.world_layer.get_state()
        reward = self.world_layer.player.get_reward()
        terminal = self.world_layer.player.game_over
        info = {}

        return observation, reward, terminal, info