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[英]Python: class methods calling other class methods when initial method is called from within another class
[英]Python dictionary nested within method auto-executes all values (methods) when outer method is called
我正在为游戏开发一个简单的框架,并且为了尝试变得更“ Pythonic”,我正在使用对象/类/字典来尝试捕获我的所有动作/行为(作为函数的方法,等等)。 )。
由于某种原因,每次我在“ Player”类中执行“ act”方法时,act中嵌入的词典都会运行其所有值(这些值又是“ Player”类的同一实例中的方法) 。 换句话说,在提示之前,玩家每次都选择“攻击,治愈和逃跑”。
我敢肯定有一个简单的解释,但是我一直在找几个小时,找不到另一个人的字典自动运行其中所有嵌入方法的示例。 你能帮我吗?
谢谢! -杰克
from random import randint
### BEGIN ALL CLASSES HERE
# To be used for all game objects (living and non-living)
class gameObject(object):
def __init__(self, name):
self.name = name
# To be used for all characters who can act in some way/be killed/change
class livingThing(gameObject):
def __init__(self, name, HP=1):
self.name = name
self.HP = HP
# The playable character(s)
class Player(livingThing):
def __init__(self,name="The Stranger", HP=4, MP=5, strength=1, intellect=1, spirit=1, luck=5, gil=6):
self.name = name
self.HP = HP
self.MP = MP
self.gil = gil
self.strength = strength
self.intellect = intellect
self.spirit = spirit
self.luck = luck
def act(player, enemy):
actions = {
"attack" : player.attack(enemy),
"heal" : player.heal(enemy),
"flee" : player.flee()
}
#Takes input from the player
decision = input("What would you like to do? ")
if decision.lower() in actions:
actions[decision.lower()]
else:
print("That didn't work! Try again.")
# Prints both player and enemy HP
def printHP(player, enemy):
print("{0}'s' HP: {1} \n{2}'s HP: {3}".format(player.name, player.HP, enemy.name, enemy.HP))
# Allows the player to attack an enemy (currently functional)
def attack(player, enemy):
enemy.HP -= player.strength
print("You strike {0} for {1} damage!".format(enemy.name, player.strength))
player.printHP(enemy)
# Allows the player to heal a certain amount of health based on its "spirit" stat (currently functional)
def heal(player, enemy):
healed = randint(0, player.spirit)
player.HP += healed
print("You've healed for {0}!".format(healed))
player.printHP(enemy)
#Allows the player to attempt to run away
def flee(player):
randluck = randint(0, player.luck)
if randluck > 3:
print("You successfully escaped!")
return player.HP
else:
print("You weren't able to escape!")
# Anything that can act with/against the player
class Actor(livingThing):
def __init__(self, name="Unknown Entity", HP=10, MP=2, gil=3):
self. name = name
self.HP = HP
self.MP = MP
self.gil = gil
### END ALL CLASSES ###
### DICTIONARIES CONTAINING ACTIONS ###
### CHARACTERS ###
fighter = Player()
monster = Actor()
fighter.act(monster)
我看到了问题。 当您执行Python代码并拥有字典时,Python将对字典进行全面评估。 如果希望将值(在key:value中)对作为这些方法的结果 ,那么这无疑是一种方法。
在您的情况下,您可以做的是引用函数本身,而不是调用它。 您可以通过去除括号来做到这一点,如下所示:
player.attack
代替
player.attack()
然后,要调用该函数,您可以执行以下操作
actions[decision.lower()](enemy)
由于您的功能之一flee不接受任何参数,因此可以为flee提供一个您根本不会在该功能中使用的参数。 如果你在设计很多很多方法,你的播放器能够用行动 ,那么一个策略是给他们都只是命名的参数,如下所示:
def f1(enemy=None,something=None,foo=None):
if enemy is None:
raise Exception("enemy cannot be None")
#process_enemy
但是,如果您还有大量参数,则可以执行以下操作:
def attack(**kwargs):
#kwargs is a dictionary of parameters provided to the function
enemy = kwargs.get('enemy',None)
if enemy is None:
raise Exception("enemy cannot be None")
def eat(**kwargs):
food = kwargs.get('food',None)
if enemy is None:
raise Exception("food cannot be None")
attack(enemy="someenemyobject")
eat(food="somefoodobject")
attack() # raises Exception
attack(food="somefoodobject") # raises Exception
food(enemy="someenemyobject") # raises Exception
food(food="somefoodobject",enemy="someenemyobject") # does not raise Exception
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