title: How to get the column names after table extracted from a PDF file using camelot? I'm new for this
body: <p>Briefly I am doing this steps.</p>
  <pre><code>tables = camelot.read_pdf(doc_file)
  tables[0].df
  </code></pre>
  <p>I am using <code>tables[0].df.columns</code> to get column names from the extracted table.</p>
  <p>But it does not give the column names.</p>