Easy way to include multiple image files from file directory through Python code?

Question

I am trying to include an unknown amount of image files with unknown file names in a document. My code is inspired by a comment on this answer: https://tex.stackexchange.com/a/53465/206040

\documentclass[12pt]{article}
\usepackage{graphicx}
\usepackage{pythontex}
\begin{document}
    Pictures:
    \begin{pycode}
        import os
        directory = "".""
        extension = ".png"
        files = [file for file in os.listdir(directory) if file.lower().endswith(extension)]
    for file in files:
        print r"\begin{figure}[!ht]"
        print r"\centering"
        print r"\includegraphics[width=10cm,height=10cm]{%s}" % file
        print r"\caption{File %s}" % file
        print r"\label{Serie}"
        print r"\end{figure}"
    \end{pycode}


\end{document}

The code is working but the images are not included in my pdf. How do I solve this or is there a better / easier way to do this?

By the way: I've wanted to use the pythontex package as it does not require using the --enable-write18 option? But I also don't know if there is an even better way.

Answer 1

Here's the solution I came up with. I have taken the liberty to introduce slight changes in your code:

\documentclass[12pt]{article}
\usepackage{graphicx}
\usepackage{pythontex}
\begin{document}
Pictures:


\begin{pycode}
import os
import textwrap
directory = '.'
extension = '.png'
files = [fn for fn in os.listdir(directory) if fn.lower().endswith(extension)]
figs = []

for count, filename in enumerate(files, 1):
    fixedfn = filename.replace(r'', r'\')
    fig = fr'''
            \begin{{figure}}[!ht]
            \centering
            \includegraphics[height=4cm]{{{filename}}}
            \caption{{File {fixedfn}}}
            \label{{Serie{count}}}
            \end{{figure}}
            '''
    figs.append(textwrap.dedent(fig))
print(''.join(figs))
\end{pycode}
\end{document}

To use this code, install pygments using pip install pygments in your Python environment.

Compiling is done in the following order:

1. Compile LaTeX file (e.g. in TeXStudio)
2. Navigate in the directory of your LaTeX file using cd and use pythontex documentname.tex in the terminal where "documentname" is the name of the LaTeX file.
3. Compile LaTeX file (e.g. in TeXStudio) again, pictures should now be visible!

Alternatively you can just use the following command as your standard compiler in TeXStudio:

txs:///pdflatex | pythontex %.tex | txs:///pdflatex

When run on my machine, the Python code produces the following LaTeX source code:

\begin{figure}[!ht]
\centering
\includegraphics[height=4cm]{1200px-LaTeX_project_logo_bird.svg.png}
\caption{File 1200px-LaTeX\_project\_logo\_bird.svg.png}
\label{Serie1}
\end{figure}
\begin{figure}[!ht]
\centering
\includegraphics[height=4cm]{campusVigo_vistas01.png}
\caption{File campusVigo_vistas01.png}
\label{Serie2}
\end{figure}
\begin{figure}[!ht]
\centering
\includegraphics[height=4cm]{opengraph-icon-200x200.png}
\caption{File opengraph-icon-200x200.png}
\label{Serie3}
\end{figure}

which results in: