If you ever need to print out a hard copy of source code and the print function of your editor of choice just doesn’t quite do it, or you want to add a nice header to the page, or you want to actually just place a source code file in a written document, here’s a nice way using everyone’s favorite: LaTeX.
tl;dr: use the listings package and input your external code file with \lstinputlisting.
So here’s the LaTeX code.
% Declare page size and style.
\documentclass[a4paper, 12pt]{article}
% Declare which packages to use..
\usepackage{listings}
% Define
\lstset{
% Define options for listings
language=Python,
% Show space characters.
showspaces=false,
% Show space characters in strings.
showstringspaces=false,
% Show tab characters.
showtabs=false,
% Break long lines that go off the page.
breaklines=true,
% Size of tabs.
tabsize=2,
% Place line numbers on left.
numbers=left,
% Place a frame around code.
frame=single,
}
\begin{document}
\lstinputlisting{models.py}
\end{document}Full options for lstset are in the listings documentation.