Python decorator 拦截器
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例1 最简单
def get_text(name): return "hello, {0}".format(name) def p_decorate(func): def func_wrapper(name): return "<p>{0}</p>".format(func(name)) return func_wrapper my_get_text = p_decorate(get_text) print(my_get_text("zhangsan"))
例2 参数通用化
def p_decorate(func): def func_wrapper(*args, **kwargs): return "<p>{0}</p>".format(func(*args, **kwargs)) return func_wrapper class Person(object): def __init__(self): self.name = "Neng" self.family = "Xiong" @p_decorate def get_fullname(self): return self.name+" "+self.family my_person = Person() print(my_person.get_fullname())
例3 根据参数,实现动态拦截器
def tags(tag_name): def tags_decorator(func): def func_wrapper(*args, **kargs): return "<{0}>{1}</{0}>".format(tag_name, func(*args, **kargs)) return func_wrapper return tags_decorator @tags("div") @tags("p") @tags("strong") def get_text(name): return "hello, "+name print(get_text("zhangsan"))
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