Accessing Local Context in a Function?

[abirmingham]

Hello!

I'm writing a gettext wrapper for various reasons. My wrapper function is defined on the template globals like so:

@jinja2.contextfilter
def my_gettext(context, str, *args, **kwargs):
    # <stuff gets done here>

template = jinja2.Environment().from_string(template_str)
template.globals['_'] = my_gettext

print(template.render({'some_global_var': 'stuff'})

The jinja template looks like this:

{{ _('Accessing a global variable works: (some_global_var)%s') }}

{% for x in [1, 2, 3] %}
  {% _('Accessing a local variable does not: (x)%s' %}
{% endfor %}

In my_gettext, I can access some_global_var via context, but I have no way of accessing the local variable x. I could do this:

{% _('Accessing a local variable does not: (x)%s', x=x %}

...and then access x via kwargs, but I would prefer not to, as in a real template this would introduce a lot of redundancy (especially if global variable access is also done this way).

My goal is to continue to implement the gettext API so that I can use tools like extraction, but I want template authors to be able to refer to variables without passing them in, as this adds verbosity and an opportunity for template author error. Are there any good solutions here?

Thank you!