Download Introduction to Tornado: Modern Web Applications with Python by Michael Dory PDF

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By Michael Dory

Stroll in the course of the fundamentals of twister, the high-performance net server identified for its velocity, simplicity, and scalability on initiatives huge and small. With this hands-on consultant, you are going to methods to use Tornado's acclaimed beneficial properties by way of operating with a number of instance purposes. you furthermore mght get most sensible practices for utilizing twister within the actual international. Are you interested by making a scalable social software, real-time analytics engine, or RESTful API - all with the ability and straightforwardness of Python? This e-book indicates you why twister is astounding selection for writing robust purposes which are easy to create, expand, and install.

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Additional resources for Introduction to Tornado: Modern Web Applications with Python

Sample text

A syntax mistake or failure to close {% block %} statements can result in 500: Internal Server Error (or a full Python stack trace, if you are running in debug mode) being printed directly out to the browser (see Figure 3-3). In short, you’ll do yourself a favor by making your templates as robust as possible, and catching errors before the templates are rendered. Templates in Practice: Burt’s Books So you think this sounds like fun, but you can’t picture how one might use it in a standard web application?

You can also use {% set foo = 'bar' %} to set variables in the middle of control blocks. There’s plenty more you can do just within control blocks, but in most cases, you’ll be better served by making use of UI modules to do more complex breakdowns for you. We’ll take a look at this more in a little bit. Using Functions Inside Templates Tornado offers several handy functions by default in all templates. These include: escape(s) Replaces &, <, and > in string s with their corresponding HTML entities.

This is where block statements come in. info A block statement encapsulates some element of a template that you might want to change when you extend it.

{% end %} Any file inheriting the template can include its own {% block header %} and {% end %} tags to plug in something different as well. html on load (see Figure 3-1). Already, we can see how this would be useful for dealing with overall page structure and would save time for multipage sites. Better yet, you can make use of multiple blocks for each page, so dynamic elements like headers and footers can be included in the same flow.

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