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          


        

Answer 1

If Nathron's solution does not fix your problem, you can use a function in combination with a global python variable to pass a variable value.

• Advantage: The variable's value will available in all templates. You can set the variable inside a block.
• Disadvantage: More overhead.

This is what I did:

child.j2:

{{ set_my_var('new var value') }}

base.j2

{% set my_var = get_my_var() %}

python code

my_var = ''


def set_my_var(value):
    global my_var 
    my_var = value
    return '' # a function returning nothing will print a "none"


def get_my_var():
    global my_var 
    return my_var 

# make functions available inside jinja2
config = { 'set_my_var': set_my_var,
           'get_my_var': get_my_var,
           ...
         }

template = env.get_template('base.j2')

generated_code = template.render(config)