title: How to sort a alphanumeric list based on numbers
body: <p>I have a list similar to this:</p>
  <pre><code>list1=['150 abc','532 rad','45 qwert']
  
  </code></pre>
  <p>I need to sort it in ascending order of numbers. However, if I use list1.sort() I get an incorrect output which is:</p>
  <pre><code>
  ['150 abc', '45 qwert', '532 rad']
  </code></pre>