knowsuchagency / Ninjadog
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======== ninjadog
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Pug_ template (formerly jade_) support in Python
- Documentation: http://journalpanic.com/ninjadog
- GitHub: https://github.com/knowsuchagency/ninjadog
Installation
ninjadog requires Python 3, node-js, npm, and the pug-cli_ library
::
brew install npm
npm install -g pug-cli
pip install ninjadog
For use with Pyramid_, just add it to the configuration
.. code-block:: python
config.include('ninjadog')
Usage
ninjadog leverages the pug-cli_ library, written in nodejs, to render
pug_ templates in Python.
It allows you to take something like this
.. code-block:: pug
html
head
title my pug template
body
#content
h1 Hello #{name}
.block
input#bar.foo1.foo2
input(type="text", placeholder="your name")
if name == "Bob"
h2 Hello Bob
ul
for book in books
li= book
else
li sorry, no books
and sprinkle some Python over it
.. code-block:: python
from ninjadog import render
context = {
'name': 'Bob',
'books': ['coloring book', 'audio book', "O'Reilly book"],
'type': 'text',
}
print(render(file=filepath, context=context, pretty=True))
to render this
.. code-block:: html
<!DOCTYPE html>
<html>
<head>
<title>my pug template</title>
</head>
<body>
<div id="content">
<h1>Hello Bob</h1>
<div class="block">
<input class="foo1 foo2" id="bar">
<input type="text" placeholder="your name">
<h2>Hello Bob</h2>
<ul>
<li>coloring book</li>
<li>audio book</li>
<li>O'Reilly book</li>
</ul>
</div>
</div>
</body>
</html>
You can even combine jinja2_ syntax for unparalleled
template-rendering power.
.. code-block:: python
from ninjadog import render
def stop_believing():
return False
context = {
'stop_believing': stop_believing,
'happy': {
'birthday': 'today',
}
}
template_string = """
h1 hello, world
if happy.birthday == 'today'
p it's time to celebrate!
p {{ "Don't" if not stop_believing() }} stop believing
"""
print(render(template_string,
context=context,
pretty=True,
with_jinja=True))
.. code-block:: html
<h1>hello, world</h1>
<p>it's time to celebrate!</p>
<p>Don't stop believing</p>
Why?
Pug_ templates are a super elegant and expressive way to write
html, IMO.
There exists a project, pyjade_ and a less-popular fork, pypugjs_,
that are pure-python implementations of the pug template engine,
but they have some minor bugs and the maintenance is a bit lacking.
I figured it would be good to have an alternative method to render
pug_ templates that used the native javascript rendering engine.
ninjadog does this by spawning the pug cli_ as a subprocess.
This means that it can't be as fast as a native template engine
like pyjade_, but it will likely be more reliable over time as
it's leveraging the popular and well-maintained nodejs implementation.
Gotchas
Currently, rendering a template with jinja2_ syntax goes through the following process:
- Render elements on the initial template through
jinja2_ - Pass the output to the
pug-cli_, gathering extensions and inclusions in the process - Render the output through
jinja2_ again, since the original template may have extended or included other templates that countainedjinja2_ syntax themselves.
What this means is that if you want to escape jinja2_ syntax, you need to do it twice.
For example, to have a literal {{ escaping inception }} rendered,
you'll need to have {{ "{{ '{{ escaping inception }}' }}" }} in your template.
对不起
.. _pug: https://pugjs.org/api/getting-started.html .. _jade: https://naltatis.github.io/jade-syntax-docs/ .. _pyjade: https://github.com/syrusakbary/pyjade .. _pypugjs: https://github.com/matannoam/pypugjs .. _pug-cli: https://www.npmjs.com/package/pug-cli .. _pug cli: https://www.npmjs.com/package/pug-cli .. _jinja2: http://jinja.pocoo.org/ .. _jinja 2: http://jinja.pocoo.org/ .. _pyramid: https://trypyramid.com/