title: No module named poppler with python-poppler installed
body: <p>please, don't mark it as duplicate, because solutions to similar questions don't work for me</p>
  
  <p>My system is ubuntu 16.04, I'm using python 2.7.12</p>
  
  <p>What I am trying to do, is to use pdftohtml to convert pdf files to html. It seems that I could do it with poppler.</p>
  
  <p>I've installed python-poppler with sudo apt-get install and it seems installed:</p>
  
  <pre><code>dpkg -s python-poppler
  Package: python-poppler
  Status: install ok installed
  Priority: optional
  Section: python
  Installed-Size: 144
  Maintainer: Ubuntu Developers &lt;ubuntu-devel-discuss@lists.ubuntu.com&gt;
  Architecture: amd64
  Version: 0.12.1-8.1
  Provides: python2.7-poppler
  Depends: libc6 (&gt;= 2.4), libglib2.0-0 (&gt;= 2.12.0), libgtk2.0-0 (&gt;= 2.8.0), libpoppler-glib8 (&gt;= 0.18.0), python (&gt;= 2.7), python (&lt;&lt; 2.8), python-gtk2 (&gt;= 2.10.0), python-gobject (&gt;= 2.10.1), python-cairo (&gt;= 1.8.4)
  Description: Poppler Python bindings
   This package includes Python bindings for LibPoppler.
   It is needed to run programs written in Python and using Poppler set.
   LibPoppler is a PDF rendering library based on xpdf PDF viewer, and used by
   kpdf and evince PDF viewers.
  Original-Maintainer: Andrea Gasparini &lt;gaspa@yattaweb.it&gt;
  Homepage: http://launchpad.net/poppler-python
  </code></pre>
  
  <p>however, on import poppler it throws an import error.
  What am I missing here?</p>