遍歷python字典給出意外行為

我需要遍歷字典，根據串列從用戶輸入中分配鍵值。如果用戶從串列中輸入了除有效值之外的任何內容，則 else 陳述句或例外會捕獲它，并重新設定串列。然后我需要獲取這些值并將它們作為引數傳遞給類物件，例如：

Class Player(self, strength, dexterity, constitution, intelligence, wisdom, charisma)
    self.strength = strength
    ...

我期望變數由值設定，但在函式結束時所有變數仍然為零。

def character_generator():
    cls()
    player_name = input(f"Please enter character name: ")
    strength = 0
    dexterity = 0
    constitution = 0
    intelligence = 0
    wisdom = 0
    charisma = 0
    display_dict = {'Strength': strength,
                    'Dexterity': dexterity,
                    'Constitution': constitution,
                    'Intelligence': intelligence,
                    'Wisdom': wisdom,
                    'Charisma': charisma}
    score_list = [15, 14, 13, 12, 10, 8]
    
    while len(score_list):
        for key in display_dict.keys():
            cls()
            
            print(score_list)
            try:
                score = int(input(f"Enter score to assign to {key}: "))
                if score in score_list:
                    print(f"{key} = {score}")
                    display_dict[key] = score
                    score_list.remove(score)
                    
                else:
                    score_list = [15, 14, 13, 12, 10, 8]  # re-set list
                    print(f"Valid scores are listed above.")
                    sleep(.5)
                    print(f"Starting over.")
                    sleep(.5)
                    break
            except ValueError:
                print(f"Invalid entry..")
                score_list = [15, 14, 13, 12, 10, 8]  # re-set list
                sleep(.5)
                print(f"Starting over.")
                sleep(.5)
                break
    for key, value in display_dict.items():
        print(key, ':', value)
    print(strength)
    print(dexterity)
    print(constitution)
    print(intelligence)
    print(wisdom)
    print(charisma)

uj5u.com熱心網友回復：

沒有什么可以更新這些區域變數，所以難怪它們沒有得到更新。

但是，您也不需要它們來做任何事情 - 只需將 dict 用作??您的單一事實來源，您甚至可以**將其放入您的 Character 建構式中。

def character_generator():
    cls()
    player_name = input(f"Please enter character name: ")
    stats = {
        "strength": 0,
        "dexterity": 0,
        "constitution": 0,
        "intelligence": 0,
        "wisdom": 0,
        "charisma": 0,
    }
    score_list = [15, 14, 13, 12, 10, 8]

    while len(score_list):
        for key in stats:
            human_key = key.capitalize()
            cls()

            print(score_list)
            try:
                score = int(input(f"Enter score to assign to {human_key}: "))
                if score in score_list:
                    print(f"{key} = {score}")
                    stats[key] = score
                    score_list.remove(score)

                else:
                    score_list = [15, 14, 13, 12, 10, 8]  # re-set list
                    print(f"Valid scores are listed above.")
                    sleep(0.5)
                    print(f"Starting over.")
                    sleep(0.5)
                    break
            except ValueError:
                print(f"Invalid entry..")
                score_list = [15, 14, 13, 12, 10, 8]  # re-set list
                sleep(0.5)
                print(f"Starting over.")
                sleep(0.5)
                break
    for key, value in stats.items():
        print(key, ":", value)
    player = Player(**stats)

此外，我會將您的代碼簡化為

def character_generator():
    stats = {
        'strength': 0,
        'dexterity': 0,
        'constitution': 0,
        'intelligence': 0,
        'wisdom': 0,
        'charisma': 0,
    }
    score_list = [15, 14, 13, 12, 10, 8]
    assert len(score_list) == len(stats)  # So we haven't been silly

    for key in stats:
        human_key = key.capitalize()
        while True:
            try:
                score = int(input(f"Enter score to assign to {human_key} (from {score_list}): "))
            except ValueError:
                print("Please enter a valid number.")
                continue
            if score in score_list:
                print(f"{key} = {score}")
                stats[key] = score
                score_list.remove(score)
                break
            else:
                print(f"Invalid score. Please try again.")
    
    for key, value in stats.items():
        print(key, ':', value)
    player = Player(**stats)

您也可以將其重構為多個函式——想到一個較小的函式來提示有效輸入。

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