title: Prepend the same string to all items in a list
body: <p>Have done some searching through Stack Exchange answered questions but have been unable to find what I am looking for.</p>
  
  <p>Given the following list:</p>
  
  <pre><code>a = [1, 2, 3, 4]
  </code></pre>
  
  <p>How would I create:</p>
  
  <pre><code>a = ['hello1', 'hello2', 'hello3', 'hello4']
  </code></pre>
  
  <p>Thanks!</p>