save project

diy2.py

+while True:
+    username = "zzy"
+    userpassword = "123456"
+    user=input("请输入用户名:")
+    password=input("请输入密码:")
+    if user == username and password==userpassword:
+        print("登录成功!欢迎来到贝尔编程！")
+        break
+    if user!=username:
+        print("账号不存在！请重新输入！")
+        continue
+    if password!=userpassword:
+        print("召唤师密码错误！请重新输入！")
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