Jinja in LaTeX

What is my problem and how do intend to solve it?

When updating your CV, you usually want to get your information straight across several systems. For example, I want to convey the same information on

However, when updating this info in a single one of these systems, I also need to update all the other systems manually. But I did not become a computer guy to do things manually.

In this post, I want to focus how to insert information (maybe even automagically?) in a LaTeX file that I got from some kind of an external source. Concretely, I use a simple Python script that evaluates some Jinja expressions inside a LaTeX template and then

What is Jinja?