title: Working with Strings/Text, TypeError: 'NoneType' object is not callable
body: <p>I am trying to put together a web scraper and came across with this error, which I have no idea how to amend, I was looking at errors with the same name, but don't see the similarity with mine.. I am quite new on this btw.</p>
  
  <p>The code is  the following,</p>
  
  <pre><code>    import bs4 as bs
      from urllib import urlopen as uReq
      sauce = uReq('http://servicios.lanacion.com.ar/archivo-f11/02/2017-c30')
      soup = bs.BeautifulSoup(sauce,'html.parser')
      acumulados = soup.findAll('li',{'class':'acumulados'})
      filename = 'LaNacion.csv'
      f = open(filename,'w')
  
      headers = "Título, Encabezado\n"
      f.write(headers)
  
      for acum in acumulados:
          title =  acumulados[0].a
          encabezado = acumulados[0].p
  
          f.write(title.replace(',',' ') + ',' + encabezado.replace(',',' ') + '\n')
      f.close()
  </code></pre>
  
  <p>Thanks!</p>