save project

1.py

+i=3
+username="python"
+userpassword="123456"
+while True:
+    if i>0:
+        i=i-1
+        name=input("请输入用户名:")
+        password =input("请输入密码:")
+        if name == usernameand and password ==userpassword:
+            print("登录成功")
+            break
+        elif name !=username:
+            print("用户名不存在")
+        else:
+            print("密码输入有误，请重新输入！")
+    else:
+        print("你的登录以用完")
+        exit()
+print("欢迎来到贝尔编程")
\ No newline at end of file