monster.py

import random
from combat import Combat

COLORS =  ['yellow', 'red', 'blue', 'green'] 

class Monster(Combat):
  min_hit_points = 1
  max_hit_points = 1
  max_experience = 1
  min_experience = 1
  weapon = 'sword'
  sound = 'roar'

  def __init__(self, **kwargs):
    self.hit_points = random.randint(self.min_hit_points, self.max_hit_points)
    self.experience = random.randint(self.min_experience, self.max_experience)
    self.color = random.choice(COLORS)

    for key, value in kwargs.items():
      setattr(self, key, value)

  def __str__(self):
    return '{} {}, HP: {}, XP: {}'.format(self.color.title(),
			       self.__class__.__name__,
			       self.hit_points, 
			       self.experience)
  def battlecry(self):
    return self.sound.upper()

class Goblin(Monster): 
  pass

class Troll(Monster):
  min_hit_points = 3
  max_hit_points = 5
  min_experience = 2
  max_experience = 6
  sound = 'growl'

class Dragon(Monster):
  min_hit_points = 5
  max_hit_points = 10
  min_experience = 6
  max_experience = 10
  sound = 'raaaaaar'

character.py

import random
from combat import Combat

class Character(Combat):
  attack_limit = 10
  experience = 0
  base_hit_points = 10
 
  def attack(self):
    roll = random.randint(1, self.attack_limit)
    if self.weapon == 'sword':
      roll += 1
    elif self.weapon == 'axe':
      roll += 2
    return roll > 4 
 
  def get_weapon(self):
    weapon_choice = input("Weapon ([S]word, [A]xe, [B]ow): ").lower()
    
    if weapon_choice in 'sab':
      if weapon_choice == 's':
        return 'sword'
      elif weapon_choice == 'a':
        return 'axe'
      else:
        return 'bow'
    else:
      return self.get_weapon()
    
  def __init__(self, **kwargs):
    self.name = input("Name: ")
    self.weapon = self.get_weapon()
    self.hit_points = self.base_hit_points

    for key, value in kwargs.items():
      setattr(self, key, value)

  def __str__(self):
    return "{}, HP: {}, XP: {}".format(self.name, self.hit_points, self.experience)

  def rest(self):
    if self.hit_points < self.base_hit_points:       self.hit_points += 1        def leveled_up(self):     return self.experience >= 5

combat.py

import random 

class Combat:
  dodge_limit = 6
  attack_limit = 6
  
  def dodge(self):
    roll = random.randint(1, self.dodge_limit)
    return roll > 4
  
  def attack(self):
    roll = random.randint(1, self.attack_limit)
    return roll > 4

game.py

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(),
			Dragon(),
			Troll(),
		]
		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():
			want_dodge = input("{} attacks! \nDodge? Y/N: ".format(self.monster))
			if want_dodge.upper() == 'Y':
				if self.player.dodge():
					print("You dodged the attack.")
				else:
					print("You got hit anyway..")
					self.player.hit_points -= 1
			elif want_dodge.upper() == 'N':
				print("{} hit you for 1 point!".format(self.monster))
				self.player.hit_points -= 1
			else:
				return self.monster_turn()
		else:
			print("{} is not attacking this turn".format(self.monster))

	def player_turn(self):
		player_action = input("Would you like to to [A]ttack, [R]est or [Q]uit? ").upper()
		if player_action == 'A':
			print("You're attacking {}".format(self.monster))
			if self.player.attack():
				if self.monster.dodge():
					print("{} dodged the 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("Your attack has failed.")
		elif player_action == 'R':
			self.player.rest()
		elif player_action == 'Q':
			sys.exit()
		else:
			return self.player_turn()
	
	def cleanup(self):
		if self.monster.hit_points <= 0:
			self.player.experience += self.monster.experience
			print("You killed {}".format(self.monster))
			print("Your experience is now {}!!".format(self.player.experience))
			self.monster = self.get_next_monster()
	
	def __init__(self):
		self.setup()

		while self.player.hit_points and (self.monster or self.monsters):
			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!")
		if self.monster or self.monsters:
			print("You lose!")
		sys.exit()
Game()