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Questions tagged [jinja2]

Jinja2 is a fast template engine for Python. It has full Unicode support, auto-escaping, inheritance, macros, and many other features.

Jinja2 is a fast template engine for Python. It is the default template engine in , can be integrated in other frameworks such as , or can be used without a framework. Features include:

  • Compose complex pages by inheriting from or including other templates
  • Automatic HTML escaping to prevent cross site scripting
  • Write reusable template macros and import them in other templates
  • Call functions with positional and keyword arguments
  • High performance with just in time compilation to Python bytecode
  • Optional ahead of time compilation
  • Optional sandboxed execution environment
  • Wide range of helpful functions for template designers
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How to convert string to uppercase / lowercase in Jinja2?

I am trying to convert to upper case a string in a Jinja template I am working on. In the template documentation, I read: upper(s) Convert a value to uppercase. So I wrote this code: {% if student.department == "Academy" %} Academy {% elif …
Xar
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How to pass a list from Python, by Jinja2 to JavaScript

Let's say I have a Python variable: list_of_items = ['1','2','3','4','5'] and I pass it to Jinja by rendering HTML, and I also have a function in JavaScript called somefunction(variable). I am trying to pass each item of list_of_items. I tried…
user1843766
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Get loop index of outer loop

In jinja, the variable loop.index holds the iteration number of the current running loop. When I have nested loops, how can I get in the inner loop the current iteration of an outer loop?
flybywire
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how to iterate over a list of list in jinja

I have a list of list like : [[elem0, elem1, elem2], [elem3, elem4, elem5], [elem6, elem7, elem8], ...] I wrote the follow template file : {% for result in results %} result[0] …
stamaimer
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Check if key exists in a Python dict in Jinja2 templates

I have a python dictionary: settings = { "foo" : "baz", "hello" : "world" } This variable settings is then available in the Jinja2 template. I want to check if a key myProperty exists in the settings dict within my template, and if so take…
Amal Antony
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Jinja2 template not rendering if-elif-else statement properly

I am trying to set the text color using css in a jinja2 template. In the following code I want to set the output string to print in a specific font color if the variable contains a string. Everytime the template is generated though it prints in…
Matty
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'if' statement in jinja2 template

I'm trying to write an if statement in jinja template: {% for key in data %} {% if key is 'priority' %}

('Priority: ' + str(data[key])

{% endif %} {% endfor %} the statement I'm trying to translate in Python is: if key ==…
Luisito
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Does PyCharm support Jinja2?

A bottle project of mine uses Jinja2. PyCharm does not automatically recognize it and shows such lines as errors. Is there a way to make Jinja2 work?
k0pernikus
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How to use float filter to show just two digits after decimal point?

I am using Flask/Jinja2 template to show a number using |float filter. Here is my code {% set proc_err = nb_err|length / sum * 100 %} ({{proc_err|float}}%) Output is a bit awkward: 17/189 (8.99470899471%) I am looking for a way to make the places…
Blaise
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jinja2 how to remove trailing newline

I'm using jinja 2 to output a yaml file but can't seem to get rid of a trailing newline and the end of a for loop. Eg the below - request: path: {{ path }} headers: origin: 'somedomain.com' user-agent: 'agent' …
Yunti
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How can I test jinja2 templates in ansible?

Sometimes I need to test some jinja2 templates that I use in my ansible roles. What is the simplest way for doing this? For example, I have a template (test.j2): {% if users is defined and users %} {% for user in users %}{{ user }} {% endfor %} {%…
Alex
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What dashes mean in jinja templates?

Found some of these in jinja files: {%- else -%} And also {% if freeswitch_dispatcher -%} See the dashes ? Any idea what it's for ?
Anto
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How to make a for loop in Jinja?

I want to make a for-loop that goes from 0 to 10 in Jinja. How do I do it?
promo
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How to write a multiline Jinja statement

I have an if statement in my Jinja templates which I want to write it in multines for readability reasons. Consider the case {% if (foo == 'foo' or bar == 'bar') and (fooo == 'fooo' or baar == 'baar') etc.. %}
topless
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Can a Jinja variable's scope extend beyond in an inner block?

I have the following Jinja template: {% set mybool = False %} {% for thing in things %}
    {% if current_user %} {% if current_user.username == thing['created_by']['username'] %} …
Matt Norris
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