スタートアップシリーズ Ｐｙｔｈｏｎで学ぶ強化学習 ［改訂第２版］ 入門から実践まで：セットアップで躓きました

Question

表題の書籍について
初めのセットアップに躓いてしましました

git clone https://github.com/icoxfog417/baby-steps-of-rl-ja.git
pip install -r requirements.txt
python welcome.py

最後にwelcome.pyを実行した結果下記のようなエラーが出力されました
こちらのエラーの原因について、教えていただきたいです。

LinuxAmazon Linux AMI release 2018.03
Python3.6になります。

エラー内容

pygame 1.9.6
Hello from the pygame community. https://www.pygame.org/contribute.html
couldn't import doomish
Couldn't import doom
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4185:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4185:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4185:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4664:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2209:(snd_pcm_open_noupdate) Unknown PCM default
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4185:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4185:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4185:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:4664:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2209:(snd_pcm_open_noupdate) Unknown PCM default
/home/ec2-user/.pyenv/versions/3.6.5/lib/python3.6/site-packages/gym/logger.py:30: UserWarning: WARN: Environment '<class 'gym_ple.ple_env.PLEEnv'>' has deprecated methods '_step' and '_reset' rather than 'step' and 'reset'. Compatibility code invoked. Set _gym_disable_underscore_compat = True to disable this behavior.
  warnings.warn(colorize('%s: %s'%('WARN', msg % args), 'yellow'))
WARNING:tensorflow:From /home/ec2-user/.pyenv/versions/3.6.5/lib/python3.6/site-packages/tensorflow/python/ops/init_ops.py:1251: calling VarianceScaling.__init__ (from tensorflow.python.ops.init_ops) with dtype is deprecated and will be removed in a future version.
Instructions for updating:
Call initializer instance with the dtype argument instead of passing it to the constructor
Traceback (most recent call last):
  File "/home/ec2-user/.pyenv/versions/3.6.5/lib/python3.6/site-packages/gym/envs/classic_control/rendering.py", line 27, in <module>
    from pyglet.gl import *
  File "/home/ec2-user/.pyenv/versions/3.6.5/lib/python3.6/site-packages/pyglet/gl/__init__.py", line 100, in <module>
    from pyglet.gl.lib import GLException
  File "/home/ec2-user/.pyenv/versions/3.6.5/lib/python3.6/site-packages/pyglet/gl/lib.py", line 143, in <module>
    from pyglet.gl.lib_glx import link_GL, link_GLU, link_GLX
  File "/home/ec2-user/.pyenv/versions/3.6.5/lib/python3.6/site-packages/pyglet/gl/lib_glx.py", line 51, in <module>
    glu_lib = pyglet.lib.load_library('GLU')
  File "/home/ec2-user/.pyenv/versions/3.6.5/lib/python3.6/site-packages/pyglet/lib.py", line 158, in load_library
    raise ImportError('Library "%s" not found.' % names[0])
ImportError: Library "GLU" not found.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "welcome.py", line 36, in <module>
    welcome()
  File "welcome.py", line 29, in welcome
    env.render(mode="human")
  File "/home/ec2-user/.pyenv/versions/3.6.5/lib/python3.6/site-packages/gym/envs/registration.py", line 176, in render
    return env._render(mode, close=False)
  File "/home/ec2-user/environment/Python/baby-steps-of-rl-ja/src/gym-ple/gym_ple/ple_env.py", line 62, in _render
    from gym.envs.classic_control import rendering
  File "/home/ec2-user/.pyenv/versions/3.6.5/lib/python3.6/site-packages/gym/envs/classic_control/rendering.py", line 34, in <module>
    ''')
ImportError: 
    Error occurred while running `from pyglet.gl import *`
    HINT: make sure you have OpenGL install. On Ubuntu, you can run 'apt-get install python-opengl'.
    If you're running on a server, you may need a virtual frame buffer; something like this should work:
    'xvfb-run -s "-screen 0 1400x900x24" python <your_script.py>'

welcome.py

import numpy as np
from tensorflow.python import keras as K
import gym
import gym_ple


def welcome():
    """
    Code to check installation of basic libraries
    """

    env = gym.make("Catcher-v0")
    num_action = env.action_space.n
    episode_count = 10

    s = env.reset()
    brain = K.Sequential()
    brain.add(K.layers.Dense(num_action, input_shape=[np.prod(s.shape)],
                             activation="softmax"))

    def policy(s):
        evaluation = brain.predict(np.array([s.flatten()]))
        return np.argmax(evaluation)

    for e in range(episode_count):
        s = env.reset()
        done = False
        while not done:
            env.render(mode="human")
            a = policy(s)
            n_state, reward, done, info = env.step(a)
            s = n_state


if __name__ == "__main__":
    welcome()

Answer 1

強化学習の題材として、Gym を利用しているようですが、ゲームなので動作させるために GUI 環境が必要です。
Amazon Linux は CUI 環境なので、その環境では実行できません。
OpenGL を使っていることからクラウド上で実行するのは難しいと思うので、ローカルのパソコンに Python を実行できる環境を作成して実行すればよいと思います。

Answer 2

必要なパッケージがインストールされていないようです。

couldn't import doomish
Couldn't import doom

pip install -r requirements.txt でエラーが発生しませんでしたか？