title: How to resolve TypeError: 'builtin_function_or_method' object is not iterable on make_file?
body: <p>On the last line, I am getting the subjected error. I am using Python 3.8.2 Shell for running the script.</p>
  
  <pre><code>f = open(fileFirst,'r').readlines
  sf = open(fileSecond,'r').readlines
  result = difflib.HtmlDiff()
  diff = result.make_file(ff, sf, fileFirst, fileSecond)
  </code></pre>