title: How to check if PDF is scanned image or contains text
body: <p>I have a large number of files, some of them are scanned images into PDF and some are full/partial text PDF.</p>
  <p>Is there a way to check these files to ensure that we are only processing files which are scanned images and not those that are full/partial text PDF files?</p>
  <p>environment: PYTHON 3.6</p>