save project

diy2.py

+i=3
+username = "python"
+userpassword = "123456"
+    while True:
+        if i>0
+            name = input("请输入用户名:")
+            password = input("请输入密码:")
+        if name==username and  password==userpassword:
+            print("登录成功")
+            break
+            if name!=username
+            print("用户名输入错误")
+            continue
+            if password!=userpassword
+            print("密码输入错误")
+        print("账号已被锁定")
+    print("欢迎来到贝尔编程!")
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