title: how can I fetch a data created by javascript calculation
body: <p>There is a site, <a href="http://www.swadpia.co.kr/goods/goods_view/CNC1000/GNC1001" rel="nofollow noreferrer">http://www.swadpia.co.kr/goods/goods_view/CNC1000/GNC1001</a></p>
  
  <p>In this site, There are many options like size, colors, etc..
  and when I select a option, total price changes</p>
  
  <p>I think that price is generated by javascript.<br>
  How can I fetch that data with python?<br>
  I want to scrapy all total price with many options.</p>