title: error: import pychart , during install source code odoo 9.0
body: <p>I wrote so many thing in requirements.txt and reinstalled but it didn't work out. I installed odoo 9.0 source code for windows. The command prompt is showing error:</p>
  
  <blockquote>
    <p>from pychart import *</p>
  </blockquote>
  
  <p>What do I need to write in requirements.txt for pychart?</p>