title: Writing a Python list into a single CSV column
body: <p>I have a list of numbers that I want to put in a single column in a .csv file. The code below writes the values across a single row. How can I change the code so that Python writes the each value on a separate row? Thanks.</p>
  
  <pre><code>        with open('returns.csv', 'wb') as f:
              writer = csv.writer(f)
              writer.writerow(daily_returns)
  </code></pre>