input: Write a function to implement an interactive text-based RPG game in Python where the player can move between different rooms and battle monsters. The function should create instances of the Player, Room, and Monster classes, initialize the game, and handle the main game loop where the player can choose actions like moving to a different room or fighting a monster. If the player's health drops to 0 or below, the game should end with a defeat message.
  
  
  class Player(object):
   def __init__(self):
   self.health = 100
   self.location = 'room one'
   self.monsters_killed = 0
  
  class Room(object):
   def __init__(self):
   self.name = ''
   self.description = ''
   self.monsters = []
  
   def add_monster(self, monster):
   self.monsters.append(monster)
  
  class Monster(object):
   def __init__(self):
   self.name = ''
   self.health = 100
  
   def attack(self, player):
   player.health -= 10
  
  def start_game():
   # Create player, rooms and monsters
   player = Player()
  
  # Main game loop
  while True:
   # Show the current room;
   print(f'You are in {player.location}.')
   # Display available actions
   print('Available actions: move, fight')
   # Get user's action
   response = input('What would you like to do? ').lower()
  
   # Moving to a new room
   if response == 'move':
   # Get the list of available rooms
   # Get the user's destination
   # Move the player to the chosen room
  
  # Fighting a monster
   if response == 'fight':
   # Get all monsters in the current room
   # Get the user's chosen monster
   # Initiate a battle between the player and the monster
  
  # End of the game
   if player.health <= 0:
   print ('You have been defeated!')
   break
  
  if __name__ == '__main__':
   start_game()
  
output: 
  def start_game():
      # Create player, rooms and monsters
      player = Player()
      room_one = Room()
      room_one.name = 'room one'
      room_one.description = 'This is the first room.'
      room_two = Room()
      room_two.name = 'room two'
      room_two.description = 'This is the second room.'
      monster_one = Monster()
      monster_one.name = 'Goblin'
      monster_two = Monster()
      monster_two.name = 'Orc'
      room_one.add_monster(monster_one)
      room_two.add_monster(monster_two)
      rooms = {'room one': room_one, 'room two': room_two}
  
      # Main game loop
      while True:
          # Show the current room;
          print(f'You are in {player.location}.')
          current_room = rooms[player.location]
          # Display available actions
          print('Available actions: move, fight')
          # Get user's action
          response = input('What would you like to do? ').lower()
  
          # Moving to a new room
          if response == 'move':
              # Get the list of available rooms
              available_rooms = [room for room in rooms if room != player.location]
              print(f'Available rooms: {", ".join(available_rooms)}')
              # Get the user's destination
              destination = input('Where would you like to go? ').lower()
              if destination in available_rooms:
                  player.location = destination
              else:
                  print('Invalid room choice.')
  
          # Fighting a monster
          elif response == 'fight':
              # Get all monsters in the current room
              monsters = current_room.monsters
              if monsters:
                  print(f'Monsters in this room: {", ".join([monster.name for monster in monsters])}')
                  # Get the user's chosen monster
                  chosen_monster_name = input('Which monster would you like to fight? ').lower()
                  chosen_monster = next((monster for monster in monsters if monster.name.lower() == chosen_monster_name), None)
                  if chosen_monster:
                      # Initiate a battle between the player and the monster
                      while player.health > 0 and chosen_monster.health > 0:
                          chosen_monster.attack(player)
                          if player.health > 0:
                              print(f'You attacked the {chosen_monster.name}!')
                              chosen_monster.health -= 10
                              if chosen_monster.health <= 0:
                                  print(f'You defeated the {chosen_monster.name}!')
                                  player.monsters_killed += 1
                                  current_room.monsters.remove(chosen_monster)
                          else:
                              print(f'The {chosen_monster.name} defeated you!')
                  else:
                      print('Invalid monster choice.')
              else:
                  print('There are no monsters in this room.')
  
          # End of the game
          if player.health <= 0:
              print('You have been defeated!')
              break
  