Python密码拒绝验证

我的代码拒绝验证输入的用户名和密码，即使输入正确

代码包括在下面；我哪里做错了？如果是的话，你能告诉我在哪里吗

干杯

import time

print ("Before playing, you must register.")
time.sleep(1)
username = open("username.txt","w+")
password = open("password.txt","w+")

print ("Please enter your desired username.")
username_input = input("> ")
print ("Please enter your desired password.")
password_input = input("> ")

username.write(username_input)
password.write(password_input)
username.close()
password.close()

time.sleep(1)
print ("Now, we must authenticate your username and password.")
time.sleep(0.5)
print ("Please input your username.")
u_input = input ('> ')
print ("Please input your password.")
p_input = input ('> ')
username.open("username.txt","r")
password.open("password.txt","r")
u_contents = username.read()
p_contents = password.read()
if u_input == u_contents:
  print ("Username authenticated.")

if p_input == p_contents:
  print ("Password authenticated.")

else:
  print ("Incorrect username or password.")

username.close()
password.close()

即使你打电话给write，内容实际上还没有写完。在关闭或刷新文件或程序退出之前，文件内容不会写入磁盘

写入文件后关闭它们。

由于某些原因，w+不工作。我张贴的完全工作的代码，我已经改变了你的。与/一起使用openimport time总是很有用的

import time

print ("Before playing, you must register.")
time.sleep(1)

print ("Please enter your desired username.")
username_input = input("> ")

print ("Please enter your desired password.")
password_input = input("> ")

with open('username.txt', 'w') as u:
        u.write(username_input)
        u.flush()
        u.close()

with open('password.txt', 'w') as p:
    p.write(password_input)
    p.flush()
    p.close()

time.sleep(1)
print ("Now, we must authenticate your username and password.")
time.sleep(0.5)
print ("Please input your username.")
u_input = input ('> ')
print ("Please input your password.")
p_input = input ('> ')

username=''
password=''
with open('xx.txt', 'r') as u:
        username = u.read()
        u.close()

with open('xxx.txt', 'r') as p:
    password = p.read()
    p.close()

if u_input == username:
  print ("Username authenticated.")

if p_input == password:
  print ("Password authenticated.")

else:
  print ("Incorrect username or password.")

输出：

---

.read读取整个文件，包括换行符。请注意：不要像您现在这样将用户凭据存储在纯文本文件中。您应该关闭文件，然后重新读取以访问其内容。@TheIncorrigible1没有向该文件写入换行符。问题是输出还没有写入文件。@JohnGordon没有写入。好电话。我建议OP和你一起学习keyword@TheIncorrigible1这只是为了学校，不是真的：我现在得到了这个错误：回溯最近的调用last:File main.py，第26行，在username.openusername.txt，r AttributeError:“_io.TextIOWrapper”对象没有属性“open”username已经是一个打开的文件；你应该调用username.close来关闭文件。我已经关闭了它，我在写入后立即插入了close；当我试图再次打开它时，编辑您的问题以显示更新的代码。很难从简短的评论中分辨出你到底改变了什么；现在应该在上面了

C:\Users\Documents>py test.py
Before playing, you must register.
Please enter your desired username.
> mike
Please enter your desired password.
> mike123
Now, we must authenticate your username and password.
Please input your username.
> mike
Please input your password.
> mike123
Username authenticated.
Password authenticated.