title: can't find max number of a list with sublist in python
body: <p>i have two lists: </p>
  
  <ol>
  <li><code>list1=[1,2,3]</code></li>
  <li><code>list2=[4,5,6]</code></li>
  </ol>
  
  <p>after using append: <code>list1[1,2,3,[4,5,6]]</code></p>
  
  <p>I want to print max number of list1 and sublist. I've tried this: </p>
  
  <pre><code>print("MAX:",max(list1))
  </code></pre>
  
  <p>but it doesn't work</p>