cross-referencing a listing item does not work

Question

I want to cross-reference a listing item. I used the label in the \lstinputlisting, but the output shows ??. Here is the script:

\documentclass{article}
\usepackage{lipsum}
\usepackage{cleveref}
\usepackage{listings}
\usepackage{xcolor}

\begin{document}
\title{Test}
\maketitle

\section{Listing}
\lstset{language=Python}\label{ls:example}

\lstinputlisting[language=Python, label=my_listing_label, caption={caption.}]{/home/e/Documents/test_latex/test.py}

\section{Another Section}
We reference~\cref{my_listing_label}
\end{document}

Here is the test.py content:

if x==y:
    print("hi")

Here is the output:

EDIT: Also, I need to add that I want the cross-referencing displayed as listing 1 not as section 1.

Answer 1

Load cleveref last

Loading cleveref last solves this issue.

Some packages are best loaded after others

Not all packages play nice with one another. Some packages which are best included in the end (in the order I have found they need to be imported) include

\usepackage{hyperref} 
\usepackage{cleveref} % After hyperref
\usepackage{caption}  % After cleveref.
\usepackage{geometry} % Last of all.

For a bit more info see the answers to Which packages should be loaded after hyperref instead of before?.

A working example

\documentclass{article}
\usepackage{lipsum}
\usepackage{listings}
\usepackage{xcolor}
\usepackage{cleveref} % <-- Now loaded last of all. 


\begin{document}
    \title{Test}
    \maketitle

    \section{Listing}
    \lstset{language=Python}\label{ls:example}

    \lstinputlisting[language=Python, label={my_listing_label}, caption={caption.}]{eg.py}

    \section{Another Section}
    We reference~\cref{my_listing_label}
\end{document}