title: Remove all whitespace in a string
body: <p>I want to eliminate all the whitespace from a string, on both ends, and in between words.</p>
  <p>I have this Python code:</p>
  <pre><code>def my_handle(self):
      sentence = ' hello  apple  '
      sentence.strip()
  </code></pre>
  <p>But that only eliminates the whitespace on both sides of the string. How do I remove all whitespace?</p>