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:")
         name = input("请输入用户名:")
         if name!=username:
         if name!=username:
             print('用户名错误。')
             print('用户名错误。')
-        continue
+        elif n==username:
+            break
         password = input("请输入密码:")
         password = input("请输入密码:")
         if password!=userpassword:
         if password!=userpassword:
              print('密码错误。')
              print('密码错误。')
-        continue
+        elif n==userpassword:
+            break
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break