Pass information from latex to python code

[dflvunoooooo]

Is it possible to pass information from latex to python. I would like to set the plot width to the textwidth of latex.

[tobiasBora]

Yes, just create a new placeholder containing something like:

set placeholder eval={__WIDTH_LATEX__}{\lenToCmNoUnit{\textwidth}}

(this requires the very latest version from master, the older version had \lenToCm but you need to manually trim the cm at the end) You can choose using the optional argument the unit, for instance matplotlib expects inches:

MWE:

\documentclass{scrartcl} 

\usepackage{robust-externalize}

\begin{document}
\begin{figure}
  \centering
  \noindent\rule{.75\linewidth}{1mm}
  \begin{CacheMeCode}{python, set placeholder eval={__LINEWIDTH__}{\lenToCmNoUnit[in]{.75\linewidth}}}
import matplotlib.pyplot as plt
import matplotlib
from matplotlib.pyplot import figure
figure(figsize=(__LINEWIDTH__, __LINEWIDTH__))
year = [2014, 2015, 2016, 2017, 2018, 2019]
tutorial_count = [39, 117, 111, 110, 67, 29]
plt.plot(year, tutorial_count, color="#6c3376", linewidth=2)
plt.title("Simple plot")
plt.xlabel('Year')
plt.ylabel('Number of futurestud.io Tutorials')
print(get_filename_from_extension(".pgf"))
# https://stackoverflow.com/a/52587591/4987648
plt.savefig("__ROBEXT_OUTPUT_PDF__", bbox_inches="tight")   
\end{CacheMeCode}
  \caption{Test}%
  \label{py:test}
\end{figure}

\end{document}

% Local Variables:
% TeX-command-extra-options: "--shell-escape -halt-on-error"
% End:

[dflvunoooooo]

Thank you very much! Latex tells me, I am using version 2.2-unstable, is this the newest version? Because lenToCmNoUnit isn't recognised.

[tobiasBora]

The version you want is 2.5+unstable. Just download the .sty from https://github.com/leo-colisson/robust-externalize/tree/master and copy it to your main folder.

[dflvunoooooo]

Perfect, it is working :) Thank you very much!