save project

diy2.py

+i=0
 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 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:
-        password = input("请输入密码:")
-        if password != userpassword:
-            print("用户名密码错误!请重新输入")
+    if i>0:
+        name = input("请输入用户名:") 
+        if name != username:     
+            print("用户名错误!请重新输入")
+            i=i+1
         else:
         else:
-            print("登录成功")
-            break
+            password = input("请输入密码:")
+            if password != userpassword:
+                print("用户名密码错误!请重新输入")
+            else:
+                print("登录成功")
+                break
+                exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file