code: def _page_to_title(page):
    
    # print("page=%s" % page)
    start_tag = u"<title>"
    end_tag = u"</title>"
    start_pos = page.find(start_tag)
    end_pos = page.find(end_tag)
    assert start_pos != -1
    assert end_pos != -1
    start_pos += len(start_tag)
    return page[start_pos:end_pos]
docs: Extract the title from a page.
  
    Args:
      page: a unicode string
    Returns:
      a unicode string