CONTENTSCHAPTER ONE QUICK LINKS • Current version: 6.5.1 (download from PyPI, release notes) • Source (GitHub) • Mailing lists: discussion and announcements • Stack Overflow • Wiki 3Tornado Documentation with pip. Note that the source distribution includes demo applications that are not present when Tornado is installed in this way, so you may wish to download a copy of the source tarball or clone the git request. See the class definition for HTTPServerRequest for a complete list of attributes. Request data in the formats used by HTML forms will be parsed for you and is made available in methods like get_query_argument

Current version: 6.5.1 (download from PyPI [https://pypi.python.org/pypi/tornado], release notes) Source (GitHub) [https://github.com/tornadoweb/tornado] Mailing lists: discussion [https://groups.google with pip. Note that the source distribution includes demo applications that are not present when Tornado is installed in this way, so you may wish to download a copy of the source tarball or clone the git request. See the class definition for HTTPServerRequest for a complete list of attributes. Request data in the formats used by HTML forms will be parsed for you and is made available in methods like get_query_argument

error 现在我们已经了解了变量如何工作，让我们看看变量可以拥有的更多数据类型。 42/562Rust 程序设计语言 简体中文版 数据类型 在 Rust 中，每一个值都有一个特定 数据类型（data type），这告诉 Rust 它被指定为何种数 据，以便明确数据处理方式。我们将看到两类数据类型子集：标量（scalar）和复合 （compound）。 记住，Rust 是 静态类型（statically some_string.push_str(", world"); | ^^^^^^^^^^^ `some_string` is a `&` reference, so the data it refers to cannot be borrowed as mutable | help: consider changing this to be a mutable reference 防止同一时间对同一数据存在多个可变引 用。新 Rustacean 们经常难以适应这一点，因为大部分语言中变量任何时候都是可变的。这 个限制的好处是 Rust 可以在编译时就避免数据竞争。数据竞争（data race）类似于竞态条 件，它可由这三个行为造成： • 两个或更多指针同时访问同一数据。 • 至少有一个指针被用来写入数据。 • 没有同步数据访问的机制。 数据竞争会导致未定义行为，难以在运行时追踪，并且难以诊断和修复；Rust