old_contents: # -*- coding: utf-8 -*-
  
  import itertools
  
  import salt.utils.network
  
  
  def parse_resolv(fp='/etc/resolv.conf'):
      ns4 = []
      ns6 = []
      search = []
      domain = ''
  
      try:
          with salt.utils.fopen(fp) as f:
              for line in f:
                  line = line.strip().split()
  
                  try:
                      (directive, arg) = (line[0].lower(), line[1:])
                      if directive == 'nameserver':
                          ip_addr = arg[0]
                          if (salt.utils.network.is_ipv4(ip_addr) and
                                  ip_addr not in ns4):
                              ns4.append(ip_addr)
                          elif (salt.utils.network.is_ipv6(ip_addr) and
                                  ip_addr not in ns6):
                              ns6.append(ip_addr)
                      elif directive == 'domain':
                          domain = arg[0]
                      elif directive == 'search':
                          search = list(itertools.takewhile(
                              lambda x: x[0] not in ('#', ';'), arg))
                  except (IndexError, RuntimeError):
                      continue
  
          return {
              'nameservers': ns4 + ns6,
              'ip4_nameservers': ns4,
              'ip6_nameservers': ns6,
              'domain': domain,
              'search': search
          }
      except IOError:
          return {}
  
new_contents: # -*- coding: utf-8 -*-
  
  import itertools  # pylint: disable=E0403
  
  import salt.utils.network
  
  
  def parse_resolv(fp='/etc/resolv.conf'):
      ns4 = []
      ns6 = []
      search = []
      domain = ''
  
      try:
          with salt.utils.fopen(fp) as f:
              for line in f:
                  line = line.strip().split()
  
                  try:
                      (directive, arg) = (line[0].lower(), line[1:])
                      if directive == 'nameserver':
                          ip_addr = arg[0]
                          if (salt.utils.network.is_ipv4(ip_addr) and
                                  ip_addr not in ns4):
                              ns4.append(ip_addr)
                          elif (salt.utils.network.is_ipv6(ip_addr) and
                                  ip_addr not in ns6):
                              ns6.append(ip_addr)
                      elif directive == 'domain':
                          domain = arg[0]
                      elif directive == 'search':
                          search = list(itertools.takewhile(
                              lambda x: x[0] not in ('#', ';'), arg))
                  except (IndexError, RuntimeError):
                      continue
  
          return {
              'nameservers': ns4 + ns6,
              'ip4_nameservers': ns4,
              'ip6_nameservers': ns6,
              'domain': domain,
              'search': search
          }
      except IOError:
          return {}
  
subject: add a missing # pylint: disable=E0403