code: def tail(
      filepath = "log.txt",
      lines    = 50
      ):
      
      try:
          filepath = os.path.expanduser(os.path.expandvars(filepath))
          if os.path.isfile(filepath):
              text = subprocess.check_output(["tail", "-" + str(lines), filepath])
              if text:
                  return text
              else:
                  return False
          else:
              return False
      except:
          return False
docs: Return a specified number of last lines of a specified file. If there is an
      error or the file does not exist, return False.