save project

diy2.py

-username = "duweining"
-userpassword = "duweining114514"
+username = "dwn"
+userpassword = "dwnNB"
 while True:
 while True:
     name = input("请输入用户名:")
     name = input("请输入用户名:")
     password = input("请输入密码:")
     password = input("请输入密码:")
     if name == username and password == userpassword:
     if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
-    if password != userpassword:
-        print("此用户不存在，请重新输入用户名")
     if name != username:
     if name != username:
+        print("此用户不存在，请重新输入用户名")
+        continue
+    if password != userpassword:
         print("密码错误！请重新输入密码")
         print("密码错误！请重新输入密码")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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