\documentclass[12pt]{article}

\title{Bopytex example -- \Var{ subject.number }}

\begin{document}

\maketitle
%- set a = 10
%- set n = 2
We have two variables
\begin{itemize}
    \item a: \Var{a}
    \item n: \Var{n}
\end{itemize}

%# We can use blocks
\begin{itemize}
%- for i in range(n)
    \item \Var{a}
%- endfor
\end{itemize}

\section{Variables}
\subsection{subject}
\Var{subject}
\subsection{options}
\Var{options}


\end{document}