为什么当我正确输入用户名时，访问被拒绝？

Question

嘿我已经写了这段代码，但我看不出它有什么问题，它是说用户名是错误的，但如果我打印它，它会返回我输入的内容。

ea = input("Do you already have an account") 
if ea == "Yes" or ea == "yes": 
    Ausername = input("Input your username") 
    Apassword = input("Input your password") 

    f=open("login.txt","r") 
    lines=f.readlines() 
    username=lines[0] 

    if (Ausername) == (username): 
     print("Welcome to the quiz") 
    else: 
     print("Access denied") 

    f.close() 

else: 
    name = input("Input your name") 

    yeargroup = input("Input your year group") 

    age = str(input("Input your age")) 

    firstusername = ((name[0]+name[1]+name[2])+(age)) 
    print((firstusername)+(" is your username")) 
    firstpassword = input("Enter what you want your password to be") 
    print(firstusername) 
    print(firstpassword) 


    login = open("login.txt","a") 
    login.write(firstusername + "\n" + name + "\n" + yeargroup + "\n" + age + "\n" + firstpassword + "\n") 
    login.close() 

print("---------------------------------------------------") 

Answer 1

文件数据在默认情况下被读入尾随换行符。比较字符串之前是否尝试过拨打str.strip？

if Ausername == username.strip(): 
    ... 

另外，如果你想要做的不区分大小写的比较，你应该转换字符串中使用str.lower，以减少你的搜索空间的大小为小写：

if ea.lower() == "yes": 
    ...