Contents 1 Quick links 3 2 Hello, world 5 3 Threads and WSGI 7 4 Installation 9 5 Documentation 11 5.1 User’s guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation CHAPTER 5 Documentation This documentation is also available in PDF and Epub formats. 5.1 User’s guide 5.1.1 Introduction Tornado is a Python web framework and asynchronous networking library fetch_coroutine(url): http_client = AsyncHTTPClient() response = await http_client.fetch(url) return response.body 5.1. User’s guide 13 Tornado Documentation, Release 5.1.1 Native vs decorated coroutines Python 3.5

utilities Frequently Asked Questions Release notes What’s new in Tornado 5.1.1 What’s new in Tornado 5.1 What’s new in Tornado 5.0.2 What’s new in Tornado 5.0.1 What’s new in Tornado 5.0 What’s new in Tornado Changed in version 4.0: Now returns a Future if no callback is given. Deprecated since version 5.1: The callback argument is deprecated and will be removed in Tornado 6.0. RequestHandler.finish(chunk=None) and raises an error if the connection is closed before all data can be sent. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render(template_name, **kwargs) Renders the

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 and raises an error if the connection is closed before all data can be sent. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render(template_name: str, **kwargs) → Future[None] same semantics as the one returned by finish. Awaiting this Future is optional. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render_string(template_name: str, **kwargs)

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 and raises an error if the connection is closed before all data can be sent. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render(template_name: str, **kwargs: Any) → same semantics as the one returned by finish. Awaiting this Future is optional. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render_string(template_name: str, **kwargs:

well. Prerequisites: Tornado 6.0 requires Python 3.5.2 or newer (See Tornado 5.1 [https://www.tornadoweb.org/en/branch5.1/] if compatibility with Python 2.7 is required). The following optional packages What’s new in Tornado 6.0.1 What’s new in Tornado 6.0 What’s new in Tornado 5.1.1 What’s new in Tornado 5.1 What’s new in Tornado 5.0.2 What’s new in Tornado 5.0.1 What’s new in Tornado 5.0 What’s new in Tornado and raises an error if the connection is closed before all data can be sent. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render(template_name: str, **kwargs) → Future[None][source]

and raises an error if the connection is closed before all data can be sent. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render(template_name: str, **kwargs: Any) → same semantics as the one returned by finish. Awaiting this Future is optional. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render_string(template_name: str, **kwargs: tunnel over an HTTP handshake. This method is only supported when HTTP/1.1 is used. New in version 5.1. RequestHandler.get_browser_locale(default: str = 'en_US') → Locale Determines the user’s locale

and raises an error if the connection is closed before all data can be sent. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render(template_name: str, **kwargs: Any) → same semantics as the one returned by finish. Awaiting this Future is optional. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render_string(template_name: str, **kwargs: tunnel over an HTTP handshake. This method is only supported when HTTP/1.1 is used. New in version 5.1. RequestHandler.get_browser_locale(default: str = 'en_US') → Locale Determines the user’s locale

and raises an error if the connection is closed before all data can be sent. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render(template_name: str, **kwargs: Any) → same semantics as the one returned by finish. Awaiting this Future is optional. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render_string(template_name: str, **kwargs: tunnel over an HTTP handshake. This method is only supported when HTTP/1.1 is used. New in version 5.1. RequestHandler.get_browser_locale(default: str = 'en_US') → Locale Determines the user’s locale

and raises an error if the connection is closed before all data can be sent. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render(template_name: str, **kwargs: Any) → same semantics as the one returned by finish. Awaiting this Future is optional. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render_string(template_name: str, **kwargs: tunnel over an HTTP handshake. This method is only supported when HTTP/1.1 is used. New in version 5.1. RequestHandler.get_browser_locale(default: str = 'en_US') → Locale Determines the user’s locale

and raises an error if the connection is closed before all data can be sent. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render(template_name: str, **kwargs: Any) → same semantics as the one returned by finish. Awaiting this Future is optional. Changed in version 5.1: Now returns a Future instead of None. RequestHandler.render_string(template_name: str, **kwargs: tunnel over an HTTP handshake. This method is only supported when HTTP/1.1 is used. New in version 5.1. RequestHandler.get_browser_locale(default: str = 'en_US') → Locale Determines the user’s locale