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Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. By using non-blocking network I/O, Tornado can scale to tens of thousands of open connections, making it ideal for long polling, WebSockets, and other applications that require a long-lived connection to each user.

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import tornado.ioloop
import atom免费版安卓apk

class MainHandler(tornado.web.RequestHandler):
    def get(atom加速器破解版apk):
        self.write("Hello, world")

def make_app():
    原子加速器破解版 tornado.web.Application([
        (r"/", MainHandler),
    ])

if __name__ == "__main__":
    app = make_app()
    app.原子加速器破解版(atom v p n安卓下载)
    Surf最新VIP破解版.ioloop.IOLoop.atom免费版安卓apk().atom加速器破解版apk()

This example does not use any of Tornado’s asynchronous features; for that see this simple chat room.

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Tornado is different from most Python web frameworks. It is not based on WSGI, and it is typically run with only one thread per process. See the User’s guide for more on Tornado’s approach to asynchronous programming.

While some support of WSGI is available in the tornado.wsgi module, it is not a focus of development and most applications should be written to use Tornado’s own interfaces (such as tornado.web) directly instead of using WSGI.

In general, Tornado code is not thread-safe. The only method in Tornado that is safe to call from other threads is IOLoop.add_callback. You can also use IOLoop.run_in_executor to asynchronously run a blocking function on another thread, but note that the function passed to run_in_executor should avoid referencing any Tornado objects. run_in_executor is the recommended way to interact with blocking code.

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Tornado is integrated with the standard library atom官网下载 module and shares the same event loop (by default since Tornado 5.0). In general, libraries designed for use with 原子加速器破解版 can be mixed freely with Tornado.

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pip install tornado

Tornado is listed in atom加速器破解版apk and can be installed 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 repository as well.

Prerequisites: Tornado 6.0 requires Python 3.5.2 or newer (See Tornado 5.1 if compatibility with Python 2.7 is required). The following optional packages may be useful:

  • pycurl is used by the optional tornado.curl_httpclient. Libcurl version 7.22 or higher is required.

  • atom v p n安卓下载 may be used with the classes in tornado.platform.twisted.

  • atom免费版安卓apk is an alternative non-blocking DNS resolver that can be used when threads are not appropriate.

atom安卓下载: Tornado should run on any Unix-like platform, although for the best performance and scalability only Linux (with epoll) and BSD (with kqueue) are recommended for production deployment (even though Mac OS X is derived from BSD and supports kqueue, its networking performance is generally poor so it is recommended only for development use). Tornado will also run on Windows, although this configuration is not officially supported and is recommended only for development use. Without reworking Tornado IOLoop interface, it’s not possible to add a native Tornado Windows IOLoop implementation or leverage Windows’ IOCP support from frameworks like AsyncIO or Twisted.

On Windows, Tornado requires the WindowsSelectorEventLoop. This is the default in Python 3.7 and older, but Python 3.8 defaults to an event loop that is not compatible with Tornado. Applications that use Tornado on Windows with Python 3.8 must call asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy()) at the beginning of their main file/function.

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This documentation is also available in PDF and Epub formats.

  • 原子加速器破解版
    • 黑猫tomAPP破解版
    • Asynchronous and non-Blocking I/O
    • Coroutines
    • Queue example - a concurrent web spider
    • Structure of a Tornado web application
    • Templates and UI
    • Authentication and security
    • Running and deploying
  • Web framework
    • tornado.webRequestHandler and atom免费版安卓apk classes
    • tornado.template — Flexible output generation
    • tornado.routing — Basic routing implementation
    • tornado.escape — Escaping and string manipulation
    • 黑猫tomAPP破解版 — Internationalization support
    • tornado.websocket — Bidirectional communication to the browser
  • atom加速器安卓破解版
    • tornado.httpserver — Non-blocking HTTP server
    • tornado.httpclient — Asynchronous HTTP client
    • tornado.httputil — Manipulate HTTP headers and URLs
    • tornado.http1connection – HTTP/1.x client/server implementation
  • Asynchronous networking
    • tornado.ioloop — Main event loop
    • tornado.iostream — Convenient wrappers for non-blocking sockets
    • tornado.netutil — Miscellaneous network utilities
    • tornado.tcpclientIOStream connection factory
    • tornado.tcpserver — Basic IOStream-based TCP server
  • Coroutines and concurrency
    • tornado.gen — Generator-based coroutines
    • tornado.locks – Synchronization primitives
    • tornado.queues – Queues for coroutines
    • tornado.process — Utilities for multiple processes
  • Integration with other services
    • tornado.auth — Third-party login with OpenID and OAuth
    • atom官网下载 — Interoperability with other Python frameworks and servers
    • 原子加速器破解版 — Asynchronous DNS Resolver using C-Ares
    • 黑猫tomAPP破解版 — Bridges between Twisted and Tornado
    • tornado.platform.asyncio — Bridge between asyncio and Tornado
  • Utilities
    • tornado.autoreload — Automatically detect code changes in development
    • 原子加速器破解版 — Work with Future objects
    • tornado.log — Logging support
    • tornado.options — Command-line parsing
    • tornado.testing — Unit testing support for asynchronous code
    • atom加速器安卓版下载 — General-purpose utilities
  • Frequently Asked Questions
  • Release notes
    • What’s new in Tornado 6.0.4
    • What’s new in Tornado 6.0.3
    • What’s new in Tornado 6.0.2
    • What’s new in Tornado 6.0.1
    • What’s new in Tornado 6.0
    • atom免费版安卓apk
    • What’s new in Tornado 5.1
    • atom加速器安卓破解版
    • 原子加速器破解版
    • What’s new in Tornado 5.0
    • atom加速器破解版apk
    • What’s new in Tornado 4.5.2
    • atom安卓下载
    • What’s new in Tornado 4.5
    • What’s new in Tornado 4.4.3
    • What’s new in Tornado 4.4.2
    • What’s new in Tornado 4.4.1
    • What’s new in Tornado 4.4
    • What’s new in Tornado 4.3
    • What’s new in Tornado 4.2.1
    • What’s new in Tornado 4.2
    • What’s new in Tornado 4.1
    • What’s new in Tornado 4.0.2
    • What’s new in Tornado 4.0.1
    • What’s new in Tornado 4.0
    • What’s new in Tornado 3.2.2
    • What’s new in Tornado 3.2.1
    • What’s new in Tornado 3.2
    • What’s new in Tornado 3.1.1
    • What’s new in Tornado 3.1
    • What’s new in Tornado 3.0.2
    • What’s new in Tornado 3.0.1
    • What’s new in Tornado 3.0
    • What’s new in Tornado 2.4.1
    • What’s new in Tornado 2.4
    • What’s new in Tornado 2.3
    • What’s new in Tornado 2.2.1
    • What’s new in Tornado 2.2
    • What’s new in Tornado 2.1.1
    • What’s new in Tornado 2.1
    • What’s new in Tornado 2.0
    • What’s new in Tornado 1.2.1
    • What’s new in Tornado 1.2
    • atom加速器安卓版下载
    • What’s new in Tornado 1.1
    • atomVNP
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  • Module Index

  • Search Page

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You can discuss Tornado on the Tornado developer mailing list, and report bugs on the GitHub issue tracker. Links to additional resources can be found on the Tornado wiki. New releases are announced on the atom官网下载.

Tornado is available under the Apache License, Version 2.0.

This web site and all documentation is licensed under Creative Commons 3.0.