NameError: name 'player' is not defined when choosing to [R]est

import sys
from character import Character
from monster import Dragon
from monster import Goblin
from monster import Troll


class Game:
  def setup(self):
    self.player = Character()
    self.monsters = [
      Goblin(),
      Troll(),
      Dragon()
    ]
    self.monster = self.get_next_monster()

  def get_next_monster(self):
    try:
      return self.monsters.pop(0)
    except IndexError:
      return None

  def monster_turn(self):
    if self.monster.attack():
      print("{} is attacking!".format(self.monster))

      if input("Dodge? Y/N").lower() == 'y':
        if self.player.dodge():
          print("You dodged the attack!")
        else:
          print("You got hit anyway!")
          self.player.hit_points -= 1
      else:
        print("{} hit you for 1 points!".format(self.monster))
        self.player.hit_points -= 1

    else:
      print("{} isn't attacking this turn.".format(self.monster))

  def player_turn(self):
    player_choice = input("[A]ttack, [R]est, [Q]uit? ").lower()
    if player_choice == 'a':
      print("You're attacking {}!".format(self.monster))

      if self.player.attack():
        if self.monster.dodge():
          print("{} dodged your attack!".format(self.monster))
        else:
          if self.player.leveled_up():
            self.monster.hit_points -= 2
          else:
            self.monster.hit_points -= 1            
          print("You hit {} with your {}!".format(
              self.monster, self.player.weapon))          
      else:
        print("You missed!")
    elif player_choice == 'r':
      player.rest()
      print("You are resting.")
    elif player_choice == 'q':
      sys.exit()
    else:
      self.player_turn()


  def cleanup(self):
    if self.monster.hit_points <= 0:
      self.player.experience += self.monster.experience
      print("You killed {}!".format(self.monster))
      self.monster = self.get_next_monster()


  def __init__(self):
    self.setup()    
    while self.player.hit_points and (self.monster or self.monster):
      print('\n' + '='*20)
      print(self.player)
      self.monster_turn()
      print('-'*20)
      self.player_turn()
      self.cleanup()
      print('\n'+'='*20)

    if self.player.hit_points:
      print("You win!")
    elif self.monsters or self.monster:
      print("You lose")
    sys.exit()


Game()