title: Lowercase and split input python 3.x
body: <p>I am trying to get an input() to be both lowercase and split (into separate words) and here is what I have:</p>
  
  <pre><code>commandSplit = input.split()
  str.join(commandSplit)
  str.lower(commandSplit)
  </code></pre>
  
  <p>However, I receive the error:</p>
  
  <blockquote>
    <p>TypeError: descriptor 'join' requires a 'str' object but received a 'list'</p>
  </blockquote>
  
  <p>Can anyone explain what the error is and how to resolve it?</p>