isp_before_refactor_example.py

class EntertainmentDevice:
  def _connectToDeviceViaHDMICord(self, device): None
  def _connectToDeviceViaRCACord(self, device): None
  def _connectToDeviceViaEthernetCord(self, device): None 
  def _connectDeviceToPowerOutlet(self, device): None 


class Television(EntertainmentDevice):
  def connectToDVD(self, dvdPlayer):
    self._connectToDeviceViaRCACord(dvdPlayer)

  def connectToGameConsole(self, gameConsole):
    self._connectToDeviceViaHDMICord(gameConsole)

  def plugInPower(self): 
    self._connectDeviceToPowerOutlet(self)

class DVDPlayer(EntertainmentDevice):
  def connectToTV(self, television):
    self._connectToDeviceViaHDMICord(television)

  def plugInPower(self):
    self._connectDeviceToPowerOutlet(self) 

class DvdPlayer(EntertainmentDevice):
  def connectToTV(self, tv):
    self._connectToDeviceViaRCACord(tv)
  
  def plugInPower(self):
    self._connectDeviceToPowerOutlet(self)

class GameConsole(EntertainmentDevice):
  def conenctToTV(self, television):
    self._connectToDeviceViaHDMICord(television)

  def plugInPower(self):
    self._connectDeviceToPowerOutlet(self)

class Router(EntertainmentDevice):
  def connectToTV(self, television):
    self._connectToDeviceViaEthernetCord(television)

  def connectToGameConsole(self, gameConsole):
    self._connectToDeviceViaEthernetCord(gameConsole)

  def plugInPower(self):
    self._connectDeviceToPowerOutlet(self)