Printing a hardcopy of source code in LaTeX

By Evan Carmi · Posted

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.

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% 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.

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