save project

diy2.py

+username = "python"
+userpassword = "123456"
+i = 3
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if i > 0:
+        i-=1
+    if name == username and password == userpassword:
+        print("登录成功!")
+        break
+    elif name != userpassword:
+        print("密码错误")
+    elif password != userpassword:
+        print("用户名错误")
+    elif:
+        print("账号已锁定")
+        exit()