title: How do I randomly pick an item from one of the lists inside a dictionary, and also get the key for the list?
body: <p>I have a dictionary of lists:</p>
  
  <pre><code>lists=dict(animals=["dog","cat","shark"],
             things=["desk","chair","pencil"],
             food=["spaghetti","ice-cream","potatoes"])
  </code></pre>
  
  <p>How can I get Python to randomly pick an item from one of the lists and tell me what list it was in? Or how do I pick a key from the dictionary and then a value from the list corresponding to that key?</p>
  
  <p>For example:</p>
  
  <pre> 
  dog - from animals
  potatoes - from food
  </pre>