title: How to remove only one occurrence of a key in a dictionary in Python?
body: <p>Suppose I have </p>
  
  <pre><code>hand={"a":"2","p":"3","l":"1","e":"1","a":"13"}
  </code></pre>
  
  <p>if i use <code>del["a"]</code> it removes all the occurrences, but how to delete only one occurrence?</p>