save project

.py

+uesrname = "python"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名：")
+    password = input(请输入密码：")
+    if name ==username and password == userpassword:
+        print("登陆成功！")
+        break
+    elif name != uesrname:
+        print("用户名不存在，请重新输入！")
+    else:
+        print("密码输入有误，请重新输入！")
+print("欢迎来到贝尔编程！")
\ No newline at end of file

。py

+uesrname = "python"
+uesrname = "python"
+userpassword = "123456"
+while True:
+    name = input("请输入用户名：")
+    password = input(请输入密码：")
+    if name ==username and password == userpassword
\ No newline at end of file