title: Read the last lineof the file
body: <p>Imagine I have a file with </p>
  
  <pre><code>Xpto,50,30,60
  Xpto,a,v,c
  Xpto,1,9,0
  Xpto,30,30,60
  </code></pre>
  
  <p>that txt file can be appended a lot of times and when I open the file I want only to get the values of the last line of the txt file... How can i do that on python? reading the last line?</p>