save project

diy2.py

+time=0
+username = "python"
+userpassword="123456"
+while True:
+    time=time+1
+    name=input("请输入账号:")
+    password=input("请输入密码:")
+    if name == username and password == userpassword:
+        print("登录成功!欢迎来到贝尔!")
+        break
+    if name != username:
+        print("账号不存在!")
+        continue
+    if  password != userpassword:
+        print("密码错误!")
+    if time==3:
+        print("输入多次错误,账号已冻结!")
+        break
+    print("请重新输入")
+