setting. Compiled templates are cached by default; to turn off this caching and reload templates so changes to the underlying files are always visible, use the application settings compiled_template_cache=False flag takes precedence): • autoreload=True: The app will watch for changes to its source files and reload itself when anything changes. This reduces the need to manually restart the server during development to provide extra robustness against syntax errors: set autoreload=True within the app to detect changes while it is running, and start it with python -m tornado.autoreload myserver.py to catch any syntax

— Bridge between asyncio and Tornado Utilities tornado.autoreload — Automatically detect code changes in development tornado.concurrent — Work with Future objects tornado.log — Logging support tornado setting. Compiled templates are cached by default; to turn off this caching and reload templates so changes to the underlying files are always visible, use the application settings compiled_template_cache=False individual flag takes precedence): autoreload=True: The app will watch for changes to its source files and reload itself when anything changes. This reduces the need to manually restart the server during development

impl Trait 语法，像这样： 202/562Rust 程序设计语言 简体中文版 pub fn notify(item: &impl Summary) { println!("Breaking news! {}", item.summarize()); } 对于 item 参数，我们指定了 impl 关键字和 trait 名称，而不是具体的类型。该参数支持任何 实现了指定 trait 语法更直观，但它实际上是更长形式的 trait bound 语法的语法糖。它看起来像： pub fn notify(item: &T) { println!("Breaking news! {}", item.summarize()); } 这种更冗长的写法与上一节的示例等价，但更为冗长。trait bound 与泛型参数声明在一起， 位于尖括号中的冒号后面。 impl