title: update new value to key in dictionary (python)
body: <p>I make a minimised DFA, to use key value style coding, I used dictionary.</p>
  
  <p>so there is a dictionary,</p>
  
  <pre><code>{1: {1:2}}
  </code></pre>
  
  <p>I want to update this dictionary add 2:3 to add key 1's dictionary.</p>
  
  <pre><code>{1: {1:2, 2:3}}
  </code></pre>
  
  <p>I don't know how to do this.</p>
  
  <p>Is any simple idea to solve this?</p>