docs: def report_onlysize(bytes_so_far, total_size, speed, eta):
      '''
      This callback for the download function is used when console width
      is not enough to print the bar.
      It prints only the sizes
      '''
      percent = int(bytes_so_far * 100 / total_size)
      current = approximate_size(bytes_so_far).center(10)
      total = approximate_size(total_size).center(10)
      sys.stdout.write('D: {0}% -{1}/{2}'.format(percent, current, total) + "eta {0}".format(eta))
      sys.stdout.write("\r")
      sys.stdout.flush()