title: Detect If Item is the Last in a List
body: <p>I am using Python 3, and trying to detect if an item is the last in a list, but sometimes there will repeats. This is my code:</p>
  
  <pre><code>a = ['hello', 9, 3.14, 9]
  for item in a:
      print(item, end='')
      if item != a[-1]:
          print(', ')
  </code></pre>
  
  <p>And I would like this output:</p>
  
  <pre><code>hello,
  9,
  3.14,
  9
  </code></pre>
  
  <p>But I get this output:</p>
  
  <pre><code>hello, 
  93.14, 
  9
  </code></pre>
  
  <p>I understand why I am getting the output I do not want.
  I would prefer if I could still use the loop, but I can work around them. (I would like to use this with more complicated code)</p>