马哥 今日小技巧 字典中get方法设置默认值 有大用

 字典中get方法设置默认值

# The get() method on dicts

# and its "default" argument

name_for_userid = {

    382: "Alice",

    590: "Bob",

    951: "Dilbert",

}

def greeting(userid):

    return "Hi %s!" % name_for_userid.get(userid, "there")

>>> greeting(382)

"Hi Alice!"

>>> greeting(333333)

"Hi there!"