save project

diy1.py

+username="python"
+userpassword="123456"
+while True:
+    name=input("请输入用户名：")
+    psaaword=input("请输入密码:")
+    if name==username and psaaword==userpassword:
+        print("登录成功!")
+        break
+    if name!=username:
+        print("用户名不存在，请重新输入！")
+        
+    if name!=userpassword:
+        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