Category: Jinja2


Released: Apr 13, View statistics for this project via Libraries. Jinja is a fast, expressive, extensible templating engine.

Special placeholders in the template allow writing code similar to Python syntax. Then the template is passed data to render the final document. Install and update using pip :. Feb 5, Apr 13, Jan 30, Jan 27, Oct 4, Apr 6, Nov 8, Apr 3, Jan 28, Jan 10, Jan 8, Jan 7, Dec 29, Jul 26, Jun 6, Aug 7, May 20, Jul 24, Oct 18, Oct 17, Aug 18, Aug 17, By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm just learning Jinja2. I have never done any templating before so I find the documentation very confusing right now. I can't seem to generate any tables. I also don't know if this is the best way to populate a table with several fields. Just pass items to template. If you need sub-items use a class or a dictionary.

In the simplest case, you can use a dictionary:. Learn more. Ask Question. Asked 8 years, 2 months ago. Active 4 years, 2 months ago. Viewed 65k times. FileSystemLoader '. Daniel Beck NomadAlien NomadAlien 7, 5 5 gold badges 21 21 silver badges 22 22 bronze badges.

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Technical site integration observational experiment live on Stack Overflow. Dark Mode Beta - help us root out low-contrast and un-converted bits. Question Close Updates: Phase 1. Linked Related 3. Hot Network Questions.It is similar to the Django template engine but provides Python-like expressions while ensuring that the templates are evaluated in a sandbox.

It is a text-based template language and thus can be used to generate any markup as well as sourcecode.

Ansible Jinja2 Template Tutorial Network Automation Cisco

The Jinja template engine allows customization of tags, [2] filters, tests, and globals. Jinja is Flask 's default template engine [4] and it is also used by Ansible [5] and Trac. Some of the features of Jinja are: [6]. Jinja, like Smartyalso ships with an easy-to-use filter system similar to the Unix pipeline.

Here is a small example of a template file example. From Wikipedia, the free encyclopedia. Redirected from Jinja2. This article may rely excessively on sources too closely associated with the subjectpotentially preventing the article from being verifiable and neutral. Please help improve it by replacing them with more appropriate citations to reliable, independent, third-party sources. January Learn how and when to remove this template message.

March 5, — via GitHub. Jinja2 Documentation 2. Retrieved Instant Flask Web Development.


Packt Publishing. Jinja2 Documentation. Retrieved 7 January Hidden categories: Pages using deprecated source tags Articles lacking reliable references from January All articles lacking reliable references Articles with example Python code. Namespaces Article Talk.

Views Read Edit View history. By using this site, you agree to the Terms of Use and Privacy Policy.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Java-based template engine based on django template syntax, adapted to render jinja templates at least the subset of jinja in use in HubSpot content. Currently used in production to render thousands of websites with hundreds of millions of page views per month on the HubSpot CMS.

Originally forked from jangod. By default, it will load only a ClasspathResourceLocator. If you want to allow Jinjava to load any file from the file system, you can add a FileResourceLocator.

You will likely want to provide your own implementation of ResourceLoader to hook into your application's template repository, and then tell jinjava about it:. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

Sign up. Jinja template engine for Java. Java HTML. Java Branch: master. Find file. Sign in Sign up. Go back. Launching Xcode If nothing happens, download Xcode and try again.A template engine or template processor is a library designed to combine templates with a data model to produce documents.

Template engines are often used to generate large amounts of emails, in source code preprocessing, or producing dynamic HTML pages. We create a template engine, where we define static parts and dynamic parts. The dynamic parts are later replaced with data. The rendering function later combines the templates with data.

The example asks for a user name and generates a message string, which is printed to the user. The template engine is similar to the Python format method; but template engines are more powerful and have many more features. We import the Template object from the jinja2 module.

Template is the central template object. It represents a compiled template and is used to evaluate it. The variable is passed in the render method. With the render method, we generate the final output. The method joins the template string with the data passed as argument.

The variable that is passed to the render method is called the context variable. The template string renders two variables: name and age. This time the variables are hard-coded.


In the example, we define a Person object. We get the name and age via the two getters.

Jinja (template engine)

It is printed in its literal meaning. Using the e filter, the data is escaped. Filters are applied with the character. Now we do not use a simple string template anymore.Jinja2 is a modern day templating language for Python developers. You can read more here. Back in the days, servers used to have a collection of files, like HTML files, which were sent over as requested by clients. These were static data being sent over.

Now, in the modern web world, we have less of static data and more of dynamic data being requested from clients and therefore sent by the server. The web totally depends on what the client is asking for, and on which user is signing in and who is logging out.

So, Jinja2 templating is being used. A template contains variables which are replaced by the values which are passed in when the template is rendered. Variables are helpful with the dynamic data.


The structure of your application helps to keep your code organised and accessible. Flask expects the templates directory to be in the same folder as the module in which it was created.

Remember to keep your templates file in the templates folder. This is a very simple HTML file. Variables are like the placeholders which store dynamic data or values.

Rendering is a process of filling these placeholders with actual data. As HTML file is rendered, data is sent to a client. The syntax is:. This renders a template from the templates folder with the given content. Values can also be passed to the templates via the content dictionary. To control the flow of the program, we create a structure which is controlled by conditional statements. Jinja 2 supports Template Inheritance, which is one of the most powerful and useful features of any template engine.

It means one template can inherit from another template. Nowadays, websites require the same layout for different pages. Almost every website has a navigation bar attached to its page. To not repeat the code, we use inheritance feature because it saves us a lot of time and also reduces work.

A base template contains the basic layout which is common to all the other templates, and it is from this base template we extend or derive the layout for other pages. This tag tells the template engine that this template extends from the parent template or base. This is an error page. So, whenever the user gives an invalid path or web address which does not exist then, Error will pop up. Thanks for reading! My previous post on Flask is here. Sign in. Jinja2 Explained in 5 Minutes! Diva Jain Follow.

Bursts of code to power through your day.This document describes the syntax and semantics of the template engine and will be most useful as reference to those creating Jinja templates. As the template engine is very flexible, the configuration from the application can be slightly different from the code presented here in terms of delimiters and behavior of undefined values. A Jinja template is simply a text file. The template syntax is heavily inspired by Django and Python.

Below is a minimal template that illustrates a few basics using the default Jinja configuration. We will cover the details later in this document:. The following example shows the default configuration settings. As stated above, any file can be loaded as a template, regardless of file extension. Adding a. Another good heuristic for identifying templates is that they are in a templates folder, regardless of extension. This is a common layout for projects.

You can mess around with the variables in templates provided they are passed in by the application. Variables may have attributes or elements on them you can access too. What attributes a variable has depends heavily on the application providing that variable. You can use a dot. If a variable or attribute does not exist, you will get back an undefined value.

What you can do with that kind of value depends on the application configuration: the default behavior is to evaluate to an empty string if printed or iterated over, and to fail for every other operation.

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For the sake of convenience, foo. This is important if an object has an item and attribute with the same name. Additionally, the attr filter only looks up attributes. Variables can be modified by filters.

Filters are separated from the variable by a pipe symbol and may have optional arguments in parentheses. Multiple filters can be chained. The output of one filter is applied to the next. Filters that accept arguments have parentheses around the arguments, just like a function call. The List of Builtin Filters below describes all the builtin filters. Tests can be used to test a variable against a common expression. To test a variable or expression, you add is plus the name of the test after the variable.

For example, to find out if a variable is defined, you can do name is definedwhich will then return true or false depending on whether name is defined in the current template context. Tests can accept arguments, too.

If the test only takes one argument, you can leave out the parentheses.

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