Category index for “tornado”

Tornado and pgettext

Recently (26.05.2015) new tornado 4.2 was released. It contains different updates, the most valuable i suppose are modules tornado.locks and tornado.queues. They migrated from package Toro, look detailed explanation in Jesse Jiryu Davis post.

Here i want to tell about another helpful function, that was added with my help - pgettext.

Tornado i18n and l10n

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Let’s talk about i18n, i10n and tornado implementation. This post have a lot of text, but i wanted to describe many things that i faced during realization of i18n in tornado project. The step by step instruction is placed in the second part of this article.

Set url for Tornado handlers

To set url for tornado handlers we can pass list of tuples (url regex, handler) into application initialisation:

application = tornado.web.Application([
    (r"/", MainHandler),
    (r"/some/path/page/(?P<pk>[0-9]+)$", PageHandler),
])

But it is more convenient to use wrapper tornado.web.url, that allows to assign meaningful names for paths (similar to django url).

Async Bitcoin RPC client

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To work with Bitcoin RPC from python there is a library Python-BitcoinRPC.

But recently i need to call API from tornado application. Mentioned lib works in synchronous, i.e. blocking mode. For tornado it will be much better to use asynchronous version. Tried to search for existing solution, but can’t find it. So i create my async fork, that use tornado’s AsyncHTTPClient: https://github.com/st4lk/python-bitcoinrpc-tornado.

Tornado web application example

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Tornado - async web framework for python. I’ll cover shortly pros and cons about tornado and introduce typical web project, that is built on top of it.

By describing pros and cons i mean my own point of view in compare with django.