code: def start(self):
          
          today = time.time()
          yesterday = today - 86400
          tomorrow = today + 86400
          today = time.localtime(today)
          yesterday = time.localtime(yesterday)
          tomorrow = time.localtime(tomorrow)
  
          fn = self.fnFromDate(today)
          if os.path.exists(fn):
              out.warn('HTML output file %r already exists' % fn)
              out.warn('the page link of previous run will skip this file')
              out.warn('try to generate HTML output only once per day')
              fn = util.getNonexistingFile(fn)
  
          d = os.path.dirname(fn)
          if not os.path.isdir(d):
              os.makedirs(d)
  
          try:
              fn_yesterday = self.fnFromDate(yesterday)
              fn_yesterday = util.getExistingFile(fn_yesterday)
              self.yesterdayUrl = self.getUrlFromFilename(fn_yesterday)
          except ValueError:
              self.yesterdayUrl = None
          self.tomorrowUrl = self.getUrlFromFilename(self.fnFromDate(tomorrow))
  
          self.html = codecs.open(fn, 'w', self.encoding)
          self.html.write(u'''<!DOCTYPE html>
  <html lang="en">
  <head>
  <meta http-equiv="Content-Type" content="text/html; charset=%s"/>
  <meta name="generator" content="%s"/>
  <title>Comics for %s</title>
  </head>
  <body>
  '''  % (self.encoding, configuration.App, time.strftime('%Y/%m/%d', today)))
          self.addNavLinks()
          self.html.write(u'<ul>\n')
          # last comic name (eg. CalvinAndHobbes)
          self.lastComic = None
          # last comic strip URL (eg. http://example.com/page42)
          self.lastUrl = None
docs: Start HTML output.