有没有一种方法可以打印列表中某个类的所有特定元素？

Question

标题很糟糕，但希望我能在帖子里解释。创建一个小游戏作为python的宠物项目，我现在正在创建清单。一切都是。。。在开发游戏的时候，直到它能够显示玩家的所有库存。你知道吗

    elif (prompt == "examine"):
        print(inventory[1].name)
        gameprompt()

好的，我创建了一个列表，其中基本上有一堆来自Items的类。为了调用这些类的name元素，我必须这样做，否则我只能得到它的内存位置，这对玩家来说基本上是无用的。我试过了

    elif (prompt == "examine"):
        print(inventory[].name)
        gameprompt()

我以为上面的例子只会打印所有Item对象的名称，但是却出现了一个编译错误，因为我没有指定哪个对象。所以我试着~

        elif (prompt == "examine"):
            print(inventory[1:1000].name)
            gameprompt()

我以为它会把所有的Item对象的名称打印到1000个，但是我显然没有，所以我以为它会把名称打印到最新的对象上，然后停止，但是这会导致另一个编译错误。。。你知道吗

如果有任何打印出一个列表中所有类对象的类元素，请让我知道。这个游戏的完整代码在这里，虽然我不认为你会需要它来帮助我解决我的问题（它也是非常大的）

playername = input("What is your name?")
zone = 1
movement = 0
restcounter = 0
searchcounter = 0
class Player:
    def __init__(self, name, hp, mp, atk, xp, dodgerate, atkrate):
        self.name = playername
        self.hp = hp
        self.mp = mp
        self.atk = atk
        self.xp = xp
        self.dodgerate = dodgerate
        self.atkrate = atkrate

class Enemy(Player):
    def __init__(self, name, gold, maxhp, hp, mp, atk, xp):
        self.name = name
        self.gold = gold
        self.maxhp = maxhp
        self.hp = hp
        self.mp = mp
        self.atk = atk
        self.xp = xp
class Items:
    def __init__(self, name, quantity, description, price, weight):
        self.name = name
        self.quantity = quantity
        self.description = description
        self.price = price
        self.weight = weight


Player = Player(playername, 1, 1, 1, 1, 25, 3)
print(Player.name + " has been created. ")



def raceselection():
   raceinput = input("Do you float towards the TEMPLE, CAVE or FOREST?")
    if raceinput == "TEMPLE":
        print("You are now a high elf. High elves utlize a lot of magical power at the cost of being very frail.")
        Player.hp = Player.hp + 24
        Player.mp = Player.mp + 100
        Player.atk = Player.atk + 50
        print("You awaken from your slumber. Your room's walls are gold plated, and you rested on a flat board.")
        print("Out the door, you see many elves with robes praying to some goddess.")
        print("You walk out of your door and into the praying area. You are immediately greeted by a tall man.")
    elif raceinput == "CAVE":
        print("You are now an orc.")
        Player.hp = Player.hp + 1000
        Player.mp = Player.mp + 15
        Player.atk = Player.atk + 50
        print("cave")
    elif raceinput == "FOREST":
        print("You are now a human.")
        Player.hp = Player.hp + 50
        Player.mp = Player.mp + 25
        Player.atk = Player.atk + 25
    else:
        print("You can't float there!")
        raceselection()


raceselection()


inventory = []
def gameprompt():
    global inventory
    global zone
    global movement
    global restcounter
    global searchcounter
    if (movement == 5):
        movement = movement - movement
        zone = zone + 1
        print("You have advanced to zone",zone,"!!!")
        gameprompt()
    if (zone == 1):
        print("Welcome to the first zone! Easy enemies are here with not very good loot./fix grammar, add description of zone/")
    elif (zone == 2):
        print("Hey, it actually travelled to the second zone, awesome!")
    elif (zone == 3):
        print("No way would this actually work!")
    prompt = input("Would you like to walk, search or rest?: ")

    if (prompt == "walk"):
        encounterchance = random.randint(1, 3)
        if (encounterchance == 2):
            if (zone == 1):
                mobspawnrate = random.randint(1,3)
                if (mobspawnrate == 1):
                    Enemy = Enemy("Blue SlimeBall", 50, 0, 25, 15, 25, 0.500)
                    print("You have encountered a " + Enemy.name + "!!!")
                elif (mobspawnrate == 2):
                    Enemy = Enemy("Blue SlimeBall", 50, 0, 25, 15, 25, 0.500)
                    print("You have encountered a " + Enemy.name + "!!!")
                elif (mobspawnrate == 3):
                    Enemy = Enemy("Blue SlimeBall", 50, 0, 25, 15, 25, 0.500)
                    print("You have encountered a " + Enemy.name + "!!!")
        else:
            movement = movement + 1
            print("You have walked a step. You are now at ",movement," steps")
            gameprompt()
    elif (prompt == "search"):
        if (searchcounter == 3):
            print("You cannot search this area anymore! Wait until you reach the next zone!")
            gameprompt()
        else:
            searchchance = random.randint(1, 5)
            if (searchchance == 1 or 2 or 3 or 4):
                searchcounter = searchcounter + 1
                print(searchcounter)
                print("You have found something!")
                searchchance = random.randint(1,4)
                if (searchchance == 1 or 2):
                    inventory.append(Items("Old Boot", 1, "An old smelly boot. It's a mystery as to who it belongs to...", 5, 50))
                    print("You have found a Boot!")
                    print(inventory)
                elif(searchchance == 3):
                    inventory.append(Items("Shiny Boot", 1, "Looks like a boot that was lightly worn. You could still wear this.", 5, 50))
                    print(inventory)
                    print("You have found a Shiny Boot!")
                elif(searchchance == 4):
                    inventory.append(Items("Golden Boot", 1, "It's too heavy to wear, but it looks like it could sell for a fortune!", 5, 50))
                    print("You have found a Golden Boot?")
                    print(inventory)
            else:
                searchcounter = searchcounter + 1
                print(searchcounter)
                print("You did not find anything of value")
           gameprompt()
    elif (prompt == "rest"):
        if (restcounter == 1):
            print("Wait until you reach the next zone to rest again!")
            gameprompt()
        else:
        # Add a MaxHP value to the player later, and the command rest will give 25% of that HP back.
            Player.hp = Player.hp + (Player.hp / 5)
            print("You have restored ",(Player.hp / 5)," hit points!")
            restcounter = restcounter + 1
            gameprompt()
    elif (prompt == "examine"):
        print(inventory[1].name)
        gameprompt()
    gameprompt()

Answer 1

列表理解或map在这里非常有效：

print([item.name for item in inventory])

理解迭代列表，并用for之前的部分计算结果“替换”列表中的每个元素。在这个例子中，它是item.name。你知道吗

°它实际上并不替换原始列表中的元素。它的计算结果是一个充满替换项的新列表。你知道吗