code: def _iscomment(line):
      
      if line.isspace():
          return True
      elif len(line.split()) >= 3:
          try:  # python 3 str
              if line.split()[0].isdecimal() and line.split()[1].isdecimal():
                  return False
          except:  # python 2 str
              if (line.decode().split()[0].isdecimal() and
                      line.split()[1].decode().isdecimal()):
                  return False
          return True
      else:
          return True
docs: Determine if a line is a comment line. A valid line contains at least three
      words, with the first two being integers. Note that Python 2 and 3 deal
      with strings differently.