raise an exception in jinja if we passed in a variable that is not present in the template

Question

Is there a method for jinja2 to raise an exception when we pass a variable that is not present in the template?

PS: This is different(or opposite) from raising an except

Answer 1

When you load your jinja2.Environment, set the 'undefined' parameter to 'jinja2.StrictUndefined', e.g.:

env = jinja2.Environment(loader=, undefined=jinja2.StrictUndefined)

You can catch and examine the render exception to see what was missing

EDIT It would help if I read your full question. :)