Python 我做了一个登录系统，但当我运行它时，它会产生一个意想不到的结果。你能修复它或改进它吗？

我后悔地在python上开始了面向对象的编程，所以我创建了一个登录系统，但当我运行它时，它最终会产生一个意想不到的结果

它本应打印“登录成功”，但没有打印，并出现“登录失败”，即使它打印模块和文件中的值，并且它们看起来相同，但它输出的结果不是？ 有人知道为什么会这样吗

firstname="food"#given veriables 
lastname="boyyyyyy"#given veriables 
username=firstname+lastname#given veriables 
password="errrorrr"#given veriables 
thislist = ["rusty_sword", "cloth_shirt", "wooden_shield","health_potion"]#given veriables 
demon_kill=0#given veriables 
potion_number=5#given veriables
gold=10#given veriables
area=0#given veriables


thisdict = {"username": firstname+lastname,"password": password,}#creates dictionary
print(thisdict)#shows dictionary
class saving:#creates class called saving
  def __init__(self,info,equipment_w,equipment_a,equipment_s,equipment_p,demon_kill_obj,potion_number_obj,gold_obj,area_obj):#creates objetcs
    self.thisdict=thisdict#sets objects values
    self.equipment_w=equipment_w#sets objects values
    self.equipment_a=equipment_a#sets objects values
    self.equipment_s=equipment_s#sets objects values
    self.equipment_p=equipment_p#sets objects values
    self.demon_kill_obj=str(demon_kill_obj)#sets objects values
    self.potion_number_obj=str(potion_number_obj)#sets objects values
    self.gold_obj=str(gold_obj)#sets objects values
    self.area_obj=str(area_obj)#sets objects values
  def fileing(self):#creates objetcs
    f=open(self.thisdict["username"]+" personalgame save.txt","a")#opens files from dictionary
    f.truncate(0)#sets file as empty
    f.write(self.thisdict["username"]+"\n")#writes in file using objects
    f.write(self.thisdict["password"]+"\n")#writes in file using objects
    f.write(self.equipment_w+"\n")#writes in file using objects
    f.write(self.equipment_a+"\n")#writes in file using objects
    f.write(self.equipment_s+"\n")#writes in file using objects
    f.write(self.equipment_p+"\n")#writes in file using objects
    f.write(self.demon_kill_obj+"\n")#writes in file using objects
    f.write(self.potion_number_obj+"\n")#writes in file using objects
    f.write(self.gold_obj+"\n")#writes in file using objects
    f.write(self.area_obj)#writes in file using objects
    f.close#closes file
kkkk=saving(thisdict,thislist[0],thislist[1],thislist[2],thislist[3],demon_kill,potion_number,gold,area)#takes info from class and saves it to kkkk
kkkk.fileing()

f=open(thisdict["username"]+" personalgame save.txt","r")#opens the file
lines=f.readlines()#sets points in the file to seperate veriables
print(username)#shows you  what username is in veriables
print(lines[0])#show you what username is in the file
if str(username)==str(lines[0]):#compares the the two veriables
  print("login sucessfull")
else:
  print("login falied")

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您尝试比较的两个变量看起来相同，但对于

行[0]

而言，末尾有新行字符

\n

，因此它们并不完全相等：

username == foodboyyyyyy
lines[0] == foodboyyyyyy\n

要解决此问题，可以从变量

行[0]

中删除

\n

字符：

if str(username)==str(lines[0].replace("\n", "")):
    print("login sucessfull")
else:
    print("login falied")

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谢谢你的帮助这是我的荣幸