新手开发者求助：StarWars Top Trump游戏读取CSV最高分报ValueError

错误原因解析 #

你碰到的ValueError: invalid literal for int() with base 10: 'score'，是因为代码把CSV文件的表头字符串'score'当成了分数数值去转成整数，自然会报错。

核心问题点 #

1. 文件读写逻辑混乱：游戏循环里重复用"w"模式打开文件，每次都会清空原有内容并重新写表头，导致历史分数丢失，后续读取时容易误处理表头。
2. 读取时机错误：你把csv.DictReader的定义放在了文件关闭的with块外面，此时文件已经关闭，迭代器失效，后续遍历拿不到有效数据。
3. 分数处理不严谨：没有处理CSV里的空行、无效值，也没考虑文件不存在的情况。

修复后的完整代码 #

import random
import requests
import csv


def random_person():
    person_number = random.randint(1, 82)
    url = 'https://swapi.dev/api/people/{}/'.format(person_number)
    response = requests.get(url)
    person = response.json()
    return {
        'name': person['name'],
        'height': person['height'],
        'mass': person['mass'],
        'birth year': person['birth_year'],
    }


def run():
    highest_score = 0
    field_names = ['player_name', 'score']
    
    # 初始化或读取历史最高分
    try:
        with open('score.csv', 'r') as csv_file:
            spreadsheet = csv.DictReader(csv_file)
            for row in spreadsheet:
                # 跳过空行或无效的score字段
                if not row.get('score'):
                    continue
                try:
                    intscore = int(row['score'])
                    if intscore > highest_score:
                        highest_score = intscore
                except ValueError:
                    continue
    except FileNotFoundError:
        # 文件不存在则创建并写入表头
        with open('score.csv', 'w') as csv_file:
            spreadsheet = csv.DictWriter(csv_file, fieldnames=field_names)
            spreadsheet.writeheader()

    print('The highest score to beat is', highest_score)
    game = input('Do you think you can beat it? y/n')
    if game == 'y':
        print('Good Luck🙌🏽')
    else:
        print('You got this🙌🏽')
    print('Hello stranger, Welcome to StarWars Top Trump!')
    player_name = input('What is your name?')
    lives_remaining = 1
    score = 0
    
    while lives_remaining > 0:
        my_person = random_person()
        print(player_name, ', you were given', my_person['name'])

        while True:
            stat_choice = input('Which stat do you want to use? ( height, mass, birth year)')
            # 统一小写判断，避免大小写输入错误
            cleaned_choice = stat_choice.strip().lower()
            if cleaned_choice not in ('height', 'mass', 'birth year'):
                print('Not an appropriate answer. Try again.')
            else:
                stat_choice = cleaned_choice
                break

        opponent_person = random_person()
        print('The opponent chose', opponent_person['name'])
        my_stat = my_person[stat_choice]
        opponent_stat = opponent_person[stat_choice]

        # 处理数值类属性的比较（身高、质量转成数字）
        try:
            my_stat_val = float(my_stat) if '.' in my_stat else int(my_stat)
            opponent_stat_val = float(opponent_stat) if '.' in opponent_stat else int(opponent_stat)
        except ValueError:
            # 出生年份带BBY/ABY，直接用字符串比较
            my_stat_val = my_stat
            opponent_stat_val = opponent_stat

        if my_stat_val > opponent_stat_val:
            print(player_name, 'You Win! 🙌🏽')
            score += 1
        elif my_stat_val == opponent_stat_val:
            print('Its A Draw!')
        else:
            lives_remaining -= 1
            print(player_name, 'You Lost a Life!')
        
        print(player_name, 'You have', lives_remaining, 'lives remaining!')
        print('Your score is', score)

    # 游戏结束后才追加写入分数，保留历史记录
    with open("score.csv", "a", newline='') as csv_file:
        spreadsheet = csv.DictWriter(csv_file, fieldnames=field_names)
        # 检查文件是否为空，空文件先写表头
        csv_file.seek(0)
        if not csv_file.read(1):
            spreadsheet.writeheader()
        spreadsheet.writerow({"player_name": player_name, 'score': score})
    
    # 更新并打印最新最高分
    with open('score.csv', 'r') as csv_file:
        spreadsheet = csv.DictReader(csv_file)
        for row in spreadsheet:
            try:
                intscore = int(row['score'])
                if intscore > highest_score:
                    highest_score = intscore
            except ValueError:
                continue
    print(f"Updated highest score is: {highest_score}")

run()

关键修复说明 #

• 文件读写优化：只在游戏结束后追加写入分数，不再每轮清空文件，保留所有历史记录；处理文件不存在的初始化场景。
• 鲁棒性提升：读取分数时跳过空行和无效值，避免转换报错；数值类属性转成数字再比较，解决字符串比较的逻辑错误（比如"180"和"90"字符串比较会出错）。
• 读取逻辑修正：所有文件读取操作都放在with块内，确保文件处于打开状态，迭代器能正常获取数据。

内容的提问来源于stack exchange，提问作者bobby brown