title: How to make list elements into string?
body: <p>I'm sorry if this is a duplicate question, but I am new to Python and not quit sure how to ask for what I need. In the most basic sense, I would like to turn this:</p>
  
  <pre><code>a = ['10', '20', '30']
  </code></pre>
  
  <p>Edit:</p>
  
  <p>It actually:</p>
  
  <pre><code>a = [10, 20, 30]
  </code></pre>
  
  <p>into</p>
  
  <pre><code>a = ['102030']
  </code></pre>
  
  <p>Thank you so much for your help!</p>