Latex: listings does not replace special characters correctly

Question

I want to include python scripts in a document, but in those scripts I use characters like á é í ó ú. I am using the literate option of \lstet. Here is an example code:

\documentclass[12pt]{article}

\usepackage[utf8]{inputenc}
\usepackage[spanish,es-tabla]{babel}
\usepackage{listings, pythonhighlight}
\lstset{ 
    basicstyle=\ttfamily\small,
    breakatwhitespace=false,
    breaklines=true,        
    inputencoding=utf8,
    extendedchars=false, 
    literate= {á}{{\'a}}1 
    {é}{{\'e}}1 
    {í}{{\'i}}1 
    {ó}{{\'o}}1 
    {ú}{{\'u}}1
}

\begin{document}
    \lstinputlisting[language=Python]{example.py}
\end{document}

With a python script (example.py) that contains:

# coding = utf-8
# á é í ó ú

I get a pdf like this:

where all special characters are substituted by the last one in the literate option.

Why is this happening?

EDIT

Using the package listingsutf8 instead of listings with

    basicstyle=\ttfamily\small,
    breakatwhitespace=false,
    breaklines=true,        
    inputencoding=utf8,
    extendedchars=false, 
    literate= {á}{{\'a}}1 
    {é}{{\'e}}1 
    {í}{{\'i}}1 
    {ó}{{\'o}}1 
    {ú}{{\'u}}1
}

does NOT change anything. Using listingsutf8 with:

\lstset{ ...
    inputencoding=utf8/latin1,
   ...
}

allows for all the special characters I need but misplaces them (all of them appear at the beginning of the python comment and not in the place they should be in the sentence).

Using listingsutf8 with:

\lstset{ ...      
    inputencoding=latin1,
...
}

does not work either because my code is utf8, so it gives me errors compiling.

Answer 1

Okay, so I have managed to make it work. I still don't know why this happened, because I've seen other people with the same problem that could solve it with ways that did not work for me. If anyone finds themselves in the same situation, here's what worked for me:

\documentclass[12pt]{article}

\usepackage[utf8]{inputenc}
\usepackage[spanish]{babel}
\usepackage{listingsutf8, pythonhighlight}
\lstset{ 
    basicstyle=\ttfamily\small,
    breakatwhitespace=false,        
    breaklines=true,        
    inputencoding=utf8/latin1,
    extendedchars=true, 
    literate= {á}{{\'a}}1 
    {é}{{\'e}}1 
    {í}{{\'i}}1 
    {ó}{{\'o}}1 
    {ú}{{\'u}}1
}

\begin{document}
    \lstinputlisting[language=Python]{Programas/data_bindings_RF.py}
\end{document}

Be aware that any other combination did not work for me. I've seen people that made it work just using the \usepackage{listingsutf8} package with the

\lstset{ 
literate= {á}{{\'a}}1 
    {é}{{\'e}}1 
    {í}{{\'i}}1 
    {ó}{{\'o}}1 
    {ú}{{\'u}}1
} 

option, but for me it yielded the same result. Same goes for any other combination of packages and settings, I'm not sure why. Good luck!