title: Python Reference Dictionary Key in same Dictionary
body: <p>I'm trying to access a key in a dictionary before "declaring" it.</p>
  
  <p>Similar to this:</p>
  
  <pre><code>test_dict = {'path': '/root/secret/', 'path2': test_dict['path']+'meow/'} 
  </code></pre>
  
  <p>I am aware that I could accomplish this by doing in the next line, like:</p>
  
  <pre><code>test_dict['path2'] = test_dict['path']+'meow'
  </code></pre>
  
  <p>however for readability i would prefer writing all the keys in the dict for a config file.</p>
  
  <p>Is this possible in Python? </p>