save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
+    i=3
+    if i>0
         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:")
+        i-=1
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
@@ -10,4 +13,5 @@ while True:
             print("用户名错误，请重新输入")
             print("用户名错误，请重新输入")
         else:
         else:
             print("密码错误，请重新输入")
             print("密码错误，请重新输入")
+    else 
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file