code: def notebook_to_md(notebook):
      
      tmp_file = tempfile.NamedTemporaryFile(delete=False)
      tmp_file.write(ipynb_writes(notebook).encode('utf-8'))
      tmp_file.close()
  
      pandoc(u'--from ipynb --to markdown -s --atx-headers --wrap=preserve --preserve-tabs', tmp_file.name, tmp_file.name)
  
      with open(tmp_file.name, encoding='utf-8') as opened_file:
          text = opened_file.read()
  
      os.unlink(tmp_file.name)
      return '\n'.join(text.splitlines())
docs: Convert a notebook to its Markdown representation, using Pandoc