title: how to create a link which points to the a potion of a chapter by using ebooklib python
body: <p>I developing an application in DJango python to create EPub fies dynamically. I am using CKEditor and ebooklib. But I have a doubt with TOC, My intention is to create a link in TOC which points to the a potion of a chapter. We can create the same as section and link to chapter but when i create so section load as a separate page,see its sample code below</p>
  <h1>Please see the sample code</h1>
  <pre><code> c2 = epub.EpubHtml(title='About this book', file_name='about.xhtml')
      c2.content='&lt;h1&gt;About this book&lt;/h1&gt;&lt;p&gt;Helou, this is my book! There are many books, but this one is mine.&lt;/p&gt;'
      c2.set_language('hr')
      c2.properties.append('rendition:layout-pre-paginated rendition:orientation-landscape rendition:spread-none')
      c2.add_item(default_css)
  
      # add chapters to the book
      book.add_item(c1)
      book.add_item(c2)
  
    
      # create table of contents
      # - add manual link
      # - add section
      # - add auto created links to chapters
  
      book.toc = (epub.Link('intro.xhtml', 'Introduction', 'intro'),
                  (epub.Section('Languages'),
                   (c1, c2))
                  )
  </code></pre>
  <p>But when I execute I will get section in a separate page.My intention is to point to the section of the chapter, not as a separate page.   (its like pointing to a subheading in  chapter) and add section link in TOC (table of contents). Please help ?</p>
  <p>Thanks</p>