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This extension to jinja make it possible to use a haml-ish syntax for your jinja templates.

It is implemented as a preprocessor and so it runs only the first time your template is parsed. So it will not affect the performance of your templates except for the first run.


Basic Usage

To use this extension you just need to add it to you jinja environment and use ".haml" as extension for your templates.

from jinja2 import Environment
from hamlish_jinja import HamlishExtension

env = Environment(extensions=[HamlishExtension])


The extension have some configuration options. In the default configuration the output will be on a single line, without whitespace, to save space.


A string, it can be one of the following:

Whitespace will be removed. This is the default
The code will be nicely indented.
The output will be similar to the haml syntax so that if you get a syntax error from jinja the debug message should display the correct line and source hint.


A list of file extensions to run the preprocessor on.



The syntax is similar to haml.

You can use tabs or spaces for indentation, but you can't mix them on the same line. It is possible to mix tabs and spaces on separate lines if you know what you are doing, but it's not recommended.

Html tags

            Tag Content
            Tag Content

Html attributes

Attributes are just like normal html attributes.

%div id="myid" class="myclass"
    Tag Content
<div id="myid" class="myclass">
    Tag Content

Inline content

%div << Tag Content
<div>Tag Content</div>

Self closing tags

Tags can be closed by ending the line with a "."

Some tags ar automatically closed: br, img, link, hr, meta, input

<br />
<div />

Continued lines

Long lines can be split over many lines by ending the line with "\" The indent of the line after the "\" will be ignored.

%div style="background: red;\
        color: blue; \
        text-decoration: underline;"
    Tag Content
<div style="background: red;color: blue; text-decoration: underline;">
    Tag Content

Escaped lines

Lines that start with one of the special characters can be escaped with "\"


Jinja tags

Jinja tags starts with "-"

-extends "layout.haml"

    -for user in users:
        %li << {{ user }}
        %li << No users
{% extends "layout.haml" %}

    {% for user in users: %}
        <li>{{ user }}</li>
    {% else: %}
        <li>No users</li>
    {% endfor %}

Jinja Variables

Variables can be output directly in content by using the normal {{ }} syntax. or "=" can be used to output a variable on beginning of lines.

-macro input(type, value):
    %input type="{{ type }}" value="{{ value }}".

%form action="" method="post"
        =input(type="text", value="Test")
{% macro input(type, value): %}
    <input type="{{ type }}" value="{{ value }}" />
{% endmacro %}

<form action="" method="post">
        {{ input(type="text", value="Test") }}

Preformatted lines

    |def test(name):
    |    print name
def test(name):
    print name

Example Template

-extends "base.haml"
-import "lib/forms.haml" as forms

-block title << Page Title

-block content:
    -call forms.form_frame(form):
            =forms.input(form.username, type="text")
            =forms.input(form.password, type="password")
            %input type="submit" value="Login"
{% extends "base.haml" %}
{% import "lib/forms.haml" as forms %}

{% block title %}Page Title{% endblock %}

{% block content: %}
    {% call forms.form_frame(form): %}
            {{ forms.input(form.username, type="text") }}
            {{ forms.input(form.password, type="password") }}
            <input type="submit" value="Login" />
    {% endcall %}
{% endblock %}
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