old_contents: """Lookup methods for device data."""
  
  import re
  
  from pyatv.const import DeviceModel
  
  
  _MODEL_LIST = {
      "AppleTV2,1": DeviceModel.Gen2,
      "AppleTV3,1": DeviceModel.Gen3,
      "AppleTV3,2": DeviceModel.Gen3,
      "AppleTV5,3": DeviceModel.Gen4,
      "AppleTV6,2": DeviceModel.Gen4K,
  }
  
  
  # Incomplete list here!
  _VERSION_LIST = {
      "17J586": "13.0",
      "17K82": "13.2",
      "17K449": "13.3",
      "17K795": "13.3.1",
      "17L256": "13.4",
  }
  
  
  def lookup_model(identifier):
      """Lookup device model from identifier."""
      return _MODEL_LIST.get(identifier, DeviceModel.Unknown)
  
  
  def lookup_version(build):
      """Lookup OS version from build."""
      if not build:
          return None
  
      version = _VERSION_LIST.get(build)
      if version:
          return version
  
      match = re.match(r"^(\d+)[A-Z]", build)
      if match:
          base = int(match.groups()[0])
  
          # 17A123 corresponds to tvOS 13.x, 16A123 to tvOS 12.x and so on
          return str(base - 4) + ".x"
  
      return None
  
new_contents: """Lookup methods for device data."""
  
  import re
  
  from pyatv.const import DeviceModel
  
  
  _MODEL_LIST = {
      "AppleTV2,1": DeviceModel.Gen2,
      "AppleTV3,1": DeviceModel.Gen3,
      "AppleTV3,2": DeviceModel.Gen3,
      "AppleTV5,3": DeviceModel.Gen4,
      "AppleTV6,2": DeviceModel.Gen4K,
  }
  
  
  # Incomplete list here!
  _VERSION_LIST = {
      "17J586": "13.0",
      "17K82": "13.2",
      "17K449": "13.3",
      "17K795": "13.3.1",
      "17L256": "13.4",
      "17L562": "13.4.5",
      "17L570": "13.4.6",
  }
  
  
  def lookup_model(identifier):
      """Lookup device model from identifier."""
      return _MODEL_LIST.get(identifier, DeviceModel.Unknown)
  
  
  def lookup_version(build):
      """Lookup OS version from build."""
      if not build:
          return None
  
      version = _VERSION_LIST.get(build)
      if version:
          return version
  
      match = re.match(r"^(\d+)[A-Z]", build)
      if match:
          base = int(match.groups()[0])
  
          # 17A123 corresponds to tvOS 13.x, 16A123 to tvOS 12.x and so on
          return str(base - 4) + ".x"
  
      return None
  
subject: Add some tvOS build numbers