用Python代码实现 for遍历字典关键字，输出关键字为su的值

当然，让我来回答您的问题。以下是Python代码实现for遍历字典关键字，输出关键字为"su"的值:

my_dict = {"name": "Mary", "age": 25, "subject": "Maths", "surname": "Sue"}

for key, value in my_dict.items():
    if key == "surname":
        print(value)

这段代码会输出字典中关键字为"su"的值"Sue"。