Home/ Questions/Q 8987701
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-15T21:51:28+00:00

I have a Python object that is an instance of a subclass of container.

  • 0

I have a Python object that is an instance of a subclass of container. So this object, x, can behave like x['name']. This object also has methods, say x.bar().

How do I call x.bar from a Django template? In the template x.bar will always be evaluated as x['bar'] first, which gives None.

The best I can think of is to create an object shadowing x, that does not have getitem. But I can’t delattr __getitem__.

Any better ideas? Short of passing in results of those calls manually in context or a template tag.

Thanks.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    This is a fundamental flaw in the way Django templates do expression evaluation. Look at the template tag {% expr -arbitrary-python-expression- %} for a workaround. E.g. {% expr x.bar(1,2,3) as snort %} gives you a new variable in the current Context named snort.

    Alternatively, you could try Jinja2 templates. They are very close to Django’s, but they allow full Python.

    Note: Jinja2 is not the same templating system as Django’s, and if you are using any page-embedded django app’s that depend on the templating system, this may break them. That is not true for the {% expr %} tag.

    • 0