类文件夹：

在游戏.py：http://pastebin.com/P7Degwna

(我没有足够的声誉发布两个以上的链接。以下断开的链接是为了完整性，但我认为它们的代码完全正确)

在魔法.py：http://pastebin.com/wpwSCDe7在

在库存.py：http://pastebin.com/8kFXJne1在

我正在努力成为一个更好的程序员，并一直遵循一个简单的战斗系统教程。目前正在实施敌方作战战术。在

我正在尝试这样的程序，如果一个敌人选择治疗，并且有超过50%的剩余，他们会重新选择一个咒语。

每当发生这种情况时，我从代码中得到以下错误Traceback (most recent call last):

File "C:/Users/Kyle/PycharmProjects/battle/main.py", line 160, in

choose_attack, spell, magic_dmg = enemy.choose_enemy_spell()

TypeError: 'NoneType' object is not iterable

以下是在此之前输出到终端的转储：

^{pr2}$

我可以看到我的玩家轮到他们了，然后敌人选择了治疗咒语，因为有太多的生命，所以选择了另一个咒语，然后我得到了非类型错误。在

当另一个不是库拉索加的咒语第一次被选中时，这个代码工作得很好。在

相关代码部分：

这是我的主程序#Create Black Magic

fire = Spell("Fire", 25, 600, "black") #create object fire from class Spell

thunder = Spell("Thunder", 25, 600, "black")

blizzard = Spell("Blizzard", 25, 600, "black")

meteor = Spell("Meteor", 40, 1200, "black")

quake = Spell("Quake", 32, 900, "black")

#Create White Magic

cure = Spell("Cure", 25, 620, "white")

cura = Spell("cura", 32, 1500, "white")

curaga = Spell("Curaga", 50, 6000, "white")

#Create lists of magic and items associated with players

player_magic = [fire, thunder, blizzard, meteor, cure, cura] #Create list of magic spell objects for object player

player_items = [{"item": potion, "quantity": 15}, {"item": hipotion, "quantity": 5}, {"item": superpotion, "quantity": 5},

{"item": elixer, "quantity": 5}, {"item": hielixer, "quantity": 2}, {"item": grenade, "quantity": 5},] #Create list of item objects for object player

#Creat lists of magic and items associated with enemies

enemy_spells = [fire, meteor, curaga]

eneny_items = []

#Istantiate Player objects

player1 = Person("Zelda", 3260, 132, 300, 34, player_magic, player_items)

#Inistantiating object player using class Person

player2 = Person("Link ", 4160, 188, 311, 34, player_magic, player_items)

player3 = Person("Sheik", 3089, 174, 288, 34, player_magic, player_items)

#Instantiate Enemy objects

enemy1 = Person("Vaati", 1250, 130, 560, 325, enemy_spells, [])

enemy2 = Person("Ganon", 18200, 701, 535, 25, enemy_spells, [])

#Instantiating object enemy using class Person

enemy3 = Person("Vaati", 1250, 130, 560, 325, enemy_spells, [])

# Enemy chose to use magic

if enemy_choice == 1:

choose_attack, spell, magic_dmg = enemy.choose_enemy_spell()

enemy.reduce_mp(spell.cost)

if spell.type == "white": # Check type of spell of object spell to determine how to handle the chosen spell.

enemy.heal(magic_dmg) # White typer means heal

print(bcolours.OKBLUE + "\n" + spell.name, " heals", enemy.name + str(magic_dmg),

"HP." + bcolours.ENDC)

elif spell.type == "black": # black type means do damage

target = random.randrange(0, 3)

players[target].take_damage(magic_dmg)

print(bcolours.OKBLUE + "\n" + enemy.name.replace(" ", "") + "'s " + spell.name, "deals",

str(magic_dmg), "points of damage to " + players[target].name + bcolours.ENDC)

if players[target].get_hp() == 0:

print(players[target].name + " has died.")

del players[target]

这来自一个包含类的文件

#Determine the spell the enemy chooses to use

def choose_enemy_spell(self):

print("Begin method")

choose_attack = 0

magic_choice = random.randrange(0, len(self.magic))

spell = self.magic[magic_choice]

magic_dmg = spell.generate_damage()

print(spell.name, "INSIDE CLASS")

pct = (self.hp / self.maxhp)*100 #percentage of health remaining

if self.mp < 25:

print("This probably isnt happening")

choose_attack = 1

return choose_attack, spell, magic_dmg

if (spell.type == "white" and pct > 50) or self.mp < spell.cost:

print("This is happening.")

self.choose_enemy_spell()

else:

print(magic_dmg, "INSIDE CLASS INSIDE METHOD INSIDE FINAL ELSE")

return choose_attack, spell, magic_dmg