save project

diy2.py

-username = "aaaa"
-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("登录成功!")
-        break
-    elif name != username:
-        print("用户名错误,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!"
+username = "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("登录成功!")
+        break
+    if name !=username:
+        print("用户名不存在!请重新输入")   
+    if password != usepassword:
+        print("密码错误!请重新输入")
+print("欢迎来到贝尔编程!")
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