我在 python 中收到此错误：IndexError：列表索引超出范围

Question

由于某种原因，我在 python 中收到错误，当文件攻击 = user_stats.readlines()[2] IndexError: list index out of range 时，我不明白这些是如何在索引之外的

这是代码：

with open(username + '.txt', 'r') as user_stats:
    level = user_stats.readlines()[1]
    attack = user_stats.readlines()[2]
    health = user_stats.readlines()[3]
    max_health = user_stats.readlines()[4]
    exp = user_stats.readlines()[5]
    money = user_stats.readlines()[6]

这是 txt 文件：

username
1
1
25
25
0
0

Answer 1

第一次调用 readlines() 读取整个文件并到达文件末尾。 每个后续调用都会返回一个空字符串，因为您已经到达文件末尾。

无需多次调用 readlines()。

Answer 2

好吧，我想通了，我知道这是最好的方法，但它确实有效

with open(username + '.txt', 'r') as user_stats:
    level = user_stats.readlines()[1]
with open(username + '.txt', 'r') as user_stats:
    attack = user_stats.readlines()[2]
with open(username + '.txt', 'r') as user_stats:
    health = user_stats.readlines()[3]
with open(username + '.txt', 'r') as user_stats:
    max_health = user_stats.readlines()[4]
with open(username + '.txt', 'r') as user_stats:
    exp = user_stats.readlines()[5]
with open(username + '.txt', 'r') as user_stats:
    money = user_stats.readlines()[6]

Answer 3

首先，正如上面的人所说，代码应该是这样的

with open('username.txt', 'r') as user_stats:
    lines = user_stats.readlines()
    level = lines[1]
    attack = lines[2]
    health = lines[3]
    max_health = lines[4]
    exp = lines[5]
    money = lines[6]
    print(username, level, attack, health, max_health, exp, money) #print to check if everything is right

其次，诸如统计数据之类的东西应该存储在对象中，但据我所知，python 构造函数有一些限制，所以我在这里真的帮不上什么忙。 更多关于构造函数