运行1-gym_developing的maze_game.py报错

[YiKangOY]

报错信息如下：
line 57, in _trans_make
self.t.loc[s, a] = tuple(n_s)
中间是嵌套的报错信息
最后到了
raise KeyError(f"None of [{key}] are in the [{axis_name}]")
KeyError: "None of [Int64Index([0, 0], dtype='int64')] are in the [index]"
代码完全没改过，请问是为什么。

[WeiqingAi]

我遇到了相同的问题，主要是pandas的int64index数学类型没法用于索引行数，bug出在 self.t.loc[s,a] = tuple(s)这句上。

[WeiqingAi]

问题已经解决，主要出在loc[element1, element2]上，element1需要整形或者标签（字符型），而源代码定义的是一个元组，因此在用loc进行切片时会出现index数据不匹配的错误。部分代码修改为：
（1）在self.observation_space = [tuple(s) for s in np.argwhere(self.map == 0)]下增加一行：
self.observation_space_str = [str(tuple(s)) for s in np.argwhere(self.map == 0)]
（2）dataframe修改为self.t = pd.DataFrame(data=None, index=self.observation_space_str, columns=self.action_space)
（3） 在n_s = np.array(s) + np.array([-1, 0])下增加：
row = str(s) #当前元组的二维数组转换为标签字符格式
if (np.all(n_s >= [0, 0])) and (np.all(n_s <= [4, 4])) and not self.map[n_s[0], n_s[1]]:
self.t.loc[row, a] = str(tuple(n_s)) #赋值为下一个状态的标签字符格式
else:
self.t.loc[row, a] = row
（4）PS:源代码的render有一些错误，需要修改后才能显示迷宫图案。
def render(self, mode='human', close=False):
if close:
if self.viewer is not None:
self.viewer.close()
self.viewer = None
return
unit = 50
screen_width = 6* unit
screen_height = 6 * unit

    if self.viewer is None:
        from gym.envs.classic_control import rendering
        self.viewer = rendering.Viewer(screen_width, screen_height)

        #创建网格
        for c in range(6):
            self.line = rendering.Line((unit/2, (c+1/2)*unit), (screen_width-unit/2, (c+1/2)*unit))
            self.line.set_color(0, 0, 0)
            self.viewer.add_geom(self.line)
        for r in range(6):
            self.line = rendering.Line(((r + 1/2)*unit, unit/2), ((r + 1/2)*unit, screen_height - unit/2))
            self.line.set_color(0, 0, 0)
            self.viewer.add_geom(self.line)

        # 创建墙壁
        for x, y in self.walls:
            self.block = rendering.make_polygon(
                v=[((x+1/2) * unit, (y+1/2)* unit),
                   ((x + 3/2) * unit, (y+1/2) * unit),
                   ((x + 3/2) * unit, (y + 3/2) * unit),
                   ((x + 1/2)* unit, (y + 3/2) * unit)])
            self.block.set_color(0, 0, 0)
            self.viewer.add_geom(self.block)

        # 创建机器人
        self.robot = rendering.make_circle(20)
        self.robotrans = rendering.Transform()
        self.robot.add_attr(self.robotrans)
        self.robot.set_color(0.8, 0.6, 0.4)
        self.viewer.add_geom(self.robot)

        # 创建出口
        self.exit = rendering.make_circle(20)
        self.exitrans = rendering.Transform(translation=(5*unit, 3*unit))
        self.exit.add_attr(self.exitrans)
        self.exit.set_color(0, 1, 0)
        self.viewer.add_geom(self.exit)

    if self.__state is None:
        return None

    self.robotrans.set_translation(self.__state[0] * unit + unit , self.__state[1] * unit + unit )
    return self.viewer.render(return_rgb_array=(mode == 'rgb_array'))

@lotharelvin