Pass variables from child template to parent in Jinja2

Question

I want to have one parent template and many children templates with their own variables that they pass to the parent, like so:

parent.html:

{% block variables %} {% endblock %}  {% if bool_var %}     {{ option_a }} {% else %}     {{ option_b }} {% endif %} 

child.html:

{% extends "parent.html" %}  {% block variables %}     {% set bool_var = True %}     {% set option_a = 'Text specific to this child template' %}     {% set option_b = 'More text specific to this child template' %} {% endblock %} 

But the variables end up undefined in the parent.

Answer 1

Ah. Apparently they won't be defined when they are passed through blocks. The solution is to just remove the block tags and set it up like so:

parent.html:

{% if bool_var %}     {{ option_a }} {% else %}     {{ option_b }} {% endif %} 

child.html:

{% extends "parent.html" %}  {% set bool_var = True %} {% set option_a = 'Text specific to this child template' %} {% set option_b = 'More text specific to this child template' %}