save project

diy2.py

-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!")
-    print("用户名和密码错误!请重新输入")
-print("欢迎来到贝尔编程!")
\ No newline at end of file
+dict1={"赵一":30,"丁二":29,"王五":35}
+dict1['丁二']=40
+print(dict1)
+if '丁二' in dict1:
+    print(dict1['丁二'])
+
+
+