multi ([http_client.fetch(url) for url in urls]) # responses is a list of HTTPResponses in the same order async def parallel_fetch_dict(urls): responses = await multi({url: http_client.fetch(url) for url objects (or tuples), each of which contains (at least) a regular expression and a handler class. Order matters; the first matching rule is used. If the regular expression contains capturing groups, these HomeHandler(tornado.web.RequestHandler): def get(self): entries = self.db.query("SELECT * FROM entries ORDER BY date DESC") self.render("home.html", entries=entries) class EntryHandler(tornado.web.RequestHandler):

([http_client.fetch(url) for url in urls]) # responses is a list of HTTPResponses in the same order async def parallel_fetch_dict(urls): responses = await multi({url: http_client.fetch(url) objects (or tuples), each of which contains (at least) a regular expression and a handler class. Order matters; the first matching rule is used. If the regular expression contains capturing groups, these HomeHandler(tornado.web.RequestHandler): def get(self):entries = self.db.query("SELECT * FROM entries ORDER BY date DESC") self.render("home.html", entries=entries) class EntryHandler(tornado.web

add_to_waitlist() {} fn seat_at_table() {} } mod serving { fn take_order() {} fn serve_order() {} fn take_payment() {} } } 示例 7-1：一个包含了其他内置了函数的模块的 front_of_house │ ├── add_to_waitlist │ └── seat_at_table └── serving ├── take_order ├── serve_order └── take_payment 示例 7-2: 示例 7-1 中代码的模块树 这个树展示了一些模块是如何被嵌入到另一个模块的（例如，hosting fix_incorrect_order 函数通过指定的 super 起始的 deliver_order 路径来调用父模块中的 deliver_order 函数。 文件名：src/lib.rs fn deliver_order() {} mod back_of_house { fn fix_incorrect_order() { cook_order();