Question

如何解决此错误？

Traceback (most recent call last):
You attacked Magus for 291 points of damage.
  File "/Users/bill/Documents/Dev/PycharmProjects/Battle/main.py", line 189, in <module>

spell, magic_dmg = enemy.choose_enemy_spell()

它有时只会发生。我不知道为什么它有时会发生，为什么有时只有这些数据是＆＃34; NoneType＆＃34;。

for enemy in enemies:
    enemy_choice = random.randrange(0, 2)

    if enemy_choice == 0:
        target = random.randrange(0, 2)
        enemy_dmg = enemies[0].generate_damage()

        players[target].take_damage(enemy_dmg)
        print(enemy.name.replace("  ", "") + " attacks " + players[target].name.replace(" ", "") + " for", str(enemy_dmg) + ".")

    elif enemy_choice == 1:
        spell, magic_dmg = enemy.choose_enemy_spell()
        enemy.reduce_mp(spell.cost)

        if spell.type == "white":
            enemy.heal(magic_dmg)
            print(bcolors.OKBLUE + spell.name + " heals " + enemy.name.replace("  ", "") + " for", str(magic_dmg), "HP." + bcolors.ENDC)
        elif spell.type == "black":

            target = random.randrange(0, 2)

            players[target].take_damage(magic_dmg)

            print(bcolors.OKBLUE + "\n" + enemy.name.replace(" ", "") + "'s " + spell.name + " deals", str(magic_dmg),
                  "points of damage to " + players[target].name.replace("  ", "") + bcolors.ENDC)

            if players[target].get_hp() == 0:
                print(players[target].name.replace("  ", "") + " has died.")
                del players[player]

以下是完整的代码：https://pastebin.com/2tztP4P4

Answer 1

错误在第400行。您没有在那里返回任何内容，这意味着您将返回None，但无法将其解包为spell, magic_dmg。

Answer 2

您需要更改choose_enemy_spell函数，以便在通过递归调用它时返回

self.choose_enemy_spell()

更改为

return self.choose_enemy_spell()

更新的功能在

之下

def choose_enemy_spell(self):
    magic_choice = random.randrange(0, len(self.magic))
    spell = self.magic[magic_choice]
    magic_dmg = spell.generate_damage()

    pct = self.hp / self.maxhp * 100

    if self.mp < spell.cost or spell.type == "white" and pct > 50:
        return self.choose_enemy_spell()
    else:
        return spell, magic_dmg

如何解决此python错误：＆＃34; TypeError：＆＃39; NoneType＆＃39;对象不可迭代＆＃34;？

2 个答案: