title: NameError: name 'base' is not defined OpenAI Gym
body: <p>[Note that I am using <code>xvfb-run -s "-screen 0 1400x900x24" jupyter notebook</code>]</p>
  
  <p>I try to run a basic set of commands in OpenAI Gym</p>
  
  <pre><code>import gym
  env = gym.make("CartPole-v0")
  obs = env.reset()
  env.render()
  </code></pre>
  
  <p>but I get the following error:</p>
  
  <pre><code>...
  
  ~/Downloads/yes/lib/python3.7/site-packages/pyglet/gl/__init__.py in &lt;module&gt;()
      225     else:
      226         from .carbon import CarbonConfig as Config
  --&gt; 227 del base
      228 
      229 # XXX remove
  
  NameError: name 'base' is not defined
  </code></pre>
  
  <p>What can I do to fix this?</p>