save project

diy2.py

+username = "python"
+userpassword = "123456"
+for i in range(3):
+    if username == input("请输入用户名:"):
+        if userpassword == input("请输入密码:"):
+            print("登录成功!")
+            break
+    else:
+        print("用户名和密码错误!请重新输入")
+        else:
+    print('你还有'+i+'次登陆机会')
+
+            print("用户名和密码错误!请重新输入")
+print("登录次数用尽，请带身份证来我司解锁！")
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