save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    while True:
-        name = input("请输入用户名:")
-        if name != username:
-            print("用户名错误，请重新输入！")
-        else:
-            break
-    while True:
-        password = input("请输入密码:")
-        if password != userpassword:
-            print("密码错误，请重新输入！")
-        else:    
-            break
+    name = input("请输入用户名:")
+    if name != username:
+        print("用户名错误，请重新输入！")
+        continue
+    password = input("请输入密码:")
+    if password != userpassword:
+        print("密码错误，请重新输入！")
+        continue
     break
     break
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file