title: Concatenating mulitple lists stored in one object
body: <p>I am currently using PRAW to extract comments from a reddit page. I want to match certain words from the comment body to values from a csv file. Here is what I am working with so far:</p>
  <pre><code>submission.comments.replace_more(limit=None)
  for comment in submission.comments.list():
      results = (re.findall(r'[A-Z]{3,5}',comment.body))
      print(results)
  </code></pre>
  <p>With an output:</p>
  <pre><code>[]
  ['HCMC']
  []
  []
  ['ASRT']
  []
  []
  ['CBBT', 'TLSS']
  ['LLEX']
  []
  </code></pre>
  <p>I understand that <code>comment.body</code> is really just a collection of lists stored within one object. Is there a way that I can concatenate the lists into one single list?</p>