save project

diy.py

+i=3
 username = "python"
 username = "python"
 userpassword="123456"
 userpassword="123456"
 while True:
 while True:
-    shuruname =input("请输入用户名：")
-    shurpwd = input("请输入密码：")
-    if shuruname == username and shuruname == userpassword
-    print("登录成功！")
-else：
-    print("密码错误！")
+    if i>0:
+        shuruname =input("请输入用户名：")
+        shurpwd = input("请输入密码：")
+        i-=1
+        if shuruname == username and shuruname == userpassword:
+            print("登录成功！")
+            break
+        elif shuruname != username:
+            print("用户错误！")
+        else:
+            print("密码错误")
+    else:
+        print("超过次数，锁定账号")
+        exit()
+print("欢迎")