Index

jinja

install jinja

pip install -U Jinja2     # python2
pip3 install -U Jinja2    # python3

jinja hello world

#!/usr/bin/python3
import jinja2
template = jinja2.Template('Hello {{ name }}!')
print(template.render(name='John Doe'))

read template from file

template = jinja2.Template(open('template.html', 'r').read())

providing data as a dictionary

data = { "name": "me" }
print(template.render(data))

comments

{# .. #}

using variables

{{ user.url }}

setting a variable

{% set a_string = 'example' %}
{% set a_reference = a_string %}

passing in a custom function

data["foo"] = lambda x: 'hello ' + x
{{foo('world')}}

ternary operator

{{ 'flag set' if flag else 'flag not set' }}

if else

{% if myvar is defined %}
	{{myvar}}
{% else %}
	undefined
{% endif %}

loop

{% for user in users %}
  <li><a href="{{ user.url }}">{{ user.username }}</a></li>
{% endfor %}

loop with range

{% for n in range(n) %}

upper case

var|upper

lower case

var|lower

replace occurrences

var|replace('_', '-')

replace occurrences (with limit)

var|replace('_', '-', 2)

documentation

https://jinja.palletsprojects.com/en/2.11.x/templates/#builtin-filters

https://jinja.palletsprojects.com/en/2.11.x/
https://jinja.palletsprojects.com/en/2.11.x/templates/