title: Summary for multiple / specific columns
body: <p>I have a table with multiple columns and instead of running the summary on specific rows e.g. <code>summary(a)</code>, <code>summary(b)</code> etc. I was wondering if there's a way to do it with a for loop.</p>
  
  <p>In psuedo code, I'd look something like this:</p>
  
  <pre><code>list = [a, b, c] #where a,b,c are column names
  for i in list:
      print(summary(i))
  </code></pre>