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get()方法访问字典
get(keyword, default_arg)
name_for_userid = {
382: "Alice",
590: "Bob",
951: "Dilbert",
}
def greeting(userid):
return "Hi %s!" % name_for_userid.get(userid, "there")
>>> greeting(382) # 访问 key 382 ,返回 value
"Hi Alice!"
>>> greeting(333333) # 访问 key 333333,不存在,使用默认value
"Hi there!"
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