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Im trying to execute a python script from within LaTeX by means of using the \input command, however I get a strange error that I can't really understand. Im following the working example taken from this answer but it simply won't work.

Example 1: \input{|python3 -c 'print(1+2)'} gives the error ! LaTeX Error: File `|python3 -c 'print(1+2)'.tex' not found. Note there's a tilde there after just before the |

Example 2: \input{|python3 test.py} gives the error ! LaTeX Error: File `|python3 test.py' not found.

Note again there's a tilde there after just before the |

Im currently using PDFLaTeX with the --shell-escape flag, but I can't really make it work.

What am I doing wrong? Here is the full code:

\documentclass[10pt, export]{standalone} \usepackage{tikz} \usepackage{animate} \usepackage{amsmath} \usepackage[left=0cm, top=0cm, bottom=-2cm, right=0cm, paperwidth=12in, paperheight=6.75in]{geometry} \usepackage{circuitikz} \begin{document} \input{|python3 -c 'print(1+2)'} \input{|python3 test.py} \end{document}

Best regards and thanks in advance

UPDATE:

Trying David's answer produces this output:

! LaTeX Error: File `|python3 -c 'print(1+2)'.tex' not found. Type X to quit or <RETURN> to proceed, or enter new name. (Default extension: tex) Enter file name: ! Emergency stop. <read *> l.10 1+2 = \input{|python3 -c 'print(1+2)'} ^^M ! ==> Fatal error occurred, no output PDF file produced!

These are the flags I'm using with PDFLatex under Kile:

--shell-escape -synctex=1 -interaction=nonstopmode %source

The same is output when compiled from the terminal as follows:

pdflatex --shell-escape -interaction=nonstopmode test.tex
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    I don't see a tilde ~ do you mean the left quote ` ? Have you used pdflatex --shell-escape to allow python to run? Commented Sep 15, 2023 at 6:06
  • Hello @DavidCarlisle, thanks for your answer. Yes, I meant the left quote (I can't reproduce it on my spanish keyboard :( ) As I described in my question Im using the --shell-escape both in kile as well as from the terminal (tried both). Commented Sep 15, 2023 at 15:56
  • ^^M rather unexpected, have you transferred the file from windows? Commented Sep 16, 2023 at 4:50
  • Sorry but I don't understand. I work under Debian Testing only. No Windows. Commented Sep 16, 2023 at 14:37

2 Answers 2

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It works if you use TeX's primitive \input, which is saved in LaTeX as \@@input:

This is script.py:

print("Number four: %d." % 4)

This works:

\documentclass{article} \makeatletter % to use \@@input \def\runshell#1{% \@@input"|#1"\relax } \makeatother \begin{document} a\runshell{python3 -c 'print(1+2)'}b a\runshell{python3 script.py}b \end{document}

enter image description here

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    it works with latex input as well Commented Sep 15, 2023 at 6:14
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    \documentclass{article} \begin{document} a\input{|python3 -c 'print(1+2)'}b a\input{|python3 script.py}b \end{document} Commented Sep 15, 2023 at 8:15
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    Thanks for your answer. I tried your solution and it works, but I can't really understand why it won't work as in @DavidCarlisle's answer. I will be marking this as solved, until I get new updates. Commented Sep 15, 2023 at 16:05
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You need --shell-escape and remove the geometry setting which is forcing the text off the page;

\documentclass[10pt, export]{standalone} \usepackage{tikz} \usepackage{animate} \usepackage{amsmath} %\usepackage[left=0cm, top=0cm, bottom=-2cm, right=0cm, paperwidth=12in, paperheight=6.75in]{geometry} \usepackage{circuitikz} \begin{document} 1+2 = \input{|python3 -c 'print(1+2)'} \end{document}

enter image description here

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  • I tried your example but it won't work. The problem persists. Im currently using debian testing and Im starting to wonder if this could be the reason behind the problem. Commented Sep 15, 2023 at 16:01
  • @Charlie this works, as does the version I added as a comment in the other answer, you could show the log you get from this answer Commented Sep 15, 2023 at 16:34
  • @Charlie if you have an old latex you may need double quotes as used in the other answer so \input{"|......."} Commented Sep 15, 2023 at 16:42
  • please see my updated answer. BTW: I have tried double quotes as well, but nothing changed :( thanks for the tip though. Commented Sep 15, 2023 at 20:26

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