save project

diy2.py

+username = "python"
+userpassword = "123456"
+i=0
+while True:
+    if i<3:
+        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 
+        print("用户名和密码错误!请重新输入")
+        if name != username:
+            input("用户名不存在，请重新输入！")
+            i+=1
+            continue 
+        if password != userpassword:
+            input("密码输入有误，请重新输入！")
+    else:
+        input("你的用户以被锁定，请拿身份证来我司验证身份！")
+        exit()
+print("欢迎来到贝尔编程!")
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