title: Updated environment variable but os.getenv() keeps returning None
body: <p>I can't seem to get my code to respond to custom environment variables  so I wrote a piece of code to test it. <code>os.getenv</code> is not pulling the environment variables that I've set in BASH into my Python code.</p>
  <pre class="lang-bash prettyprint-override"><code>$ FRUSTRATION=&quot;PYTHON!!&quot;
  $ echo $FRUSTRATION
  PYTHON!!
  $ ipython
  In [1]: import os
  
  In [2]: very_frustrated = os.getenv(&quot;FRUSTRATION&quot;)
  
  In [3]: print(very_frustrated)
  None
  </code></pre>