listings caption number

Question

I'm using the listings package with this \begin command:

\begin{lstlisting}[
   language=Python,
   caption={Simple Python Program},
]

This yields a nice code listing with a caption like "Listing 1 Simple Python Program". Is there a way to change the caption and have something like "Listing 1-1 Simple Python Program" in which the 1-1 is the combination of the section number and the subsection number?

Any hint will be greatly appreciated!

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See also http://tex.stackexchange.com/questions/28333/continuous-v-per-chapter-section-numbering-of-figures-tables-and-other-docume — lockstep, Mar 02 '12 at 08:15

score 6 · Answer 1 · answered Dec 17 '14 at 02:10

You could also use something like this in your document preamble:

\usepackage{chngcntr}
\AtBeginDocument{\counterwithin{lstlisting}{section}}

This would resemble the same behaviour as:

\renewcommand{\thelstlisting}{\thechapter.\thesection.\arabic{lstlisting}}

But I think the first variant is much cleaner and more flexible. You could specify \AtBeginDocument{\counterwithin{lstlisting}{subsection}} just as well.

Or \AtBeginDocument{\counterwithin{lstlisting}{chapter}} if you like.

I hope this helps.

score 6 · Answer 2 · answered Mar 02 '12 at 05:57

Listings are printed with the counter lstlisting. You can modify the way it prints and prepend the section number \thesection using

\renewcommand{\thelstlisting}{\thesection-\arabic{lstlisting}}

Here's a minimal example showing the same listing using two different numbering styles. Add the above code to your document preamble after loading the listings package.

enter image description here

\documentclass{article}
\usepackage{listings}% http://ctan.org/pkg/listings
\begin{document}
\section{My section}
\begin{lstlisting}[
   language=Python,
   caption={Simple Python Program}
]
print "Hello, World!"
\end{lstlisting}

\renewcommand{\thelstlisting}{\thesection-\arabic{lstlisting}}

\begin{lstlisting}[
   language=Python,
   caption={Simple Python Program}
]
print "Hello, World!"
\end{lstlisting}
\end{document}

If all your listings use language=Python, you can perform a global setting via

\lstset{language=Python}

listings caption number

2 Answers2