title: How do you write in the header column for CSV file?
body: <pre><code>def write_vt(d, filename):
      f = open(filename, 'w')
  </code></pre>
  
  <p>I am supposed to open the new file in write mode and then write in the header column, then use a for loop to add strings of data into the file. But I just can't figure out how to do this... </p>
  
  <p>Original filename is <code>votes.csv</code>.</p>