title: locals().update(dictionary) doesn't add all the variables
body: <p>I have been loading variables using dictionary objects, but the values get updated.  What am I missing here?</p>
  
  <pre><code>assert "run_LMM" in all_variables.keys()
  locals().update(all_variables)
  assert "run_LMM" in locals()
  </code></pre>
  
  <p>The last line is were I get an assertion error.  What's going on?</p>