Export Python variables and import them into your LaTeX document -- Combining Python with LaTeX

Do you have a dataset in Python that you want to include in your LaTeX document? In this video, I'll show you how to import Python variables into your LaTeX document in a simple and efficient way using the datatool package and filecontents.

We'll start by creating a Python script that generates a dataset, and then we'll use the filecontents package to save it to a file. Next, we'll use the datatool package to read the dataset from the file and create a database in LaTeX. Finally, we'll use the database to display the dataset in a table in our LaTeX document.

Whether you're a researcher, a student, or a data analyst, this technique can save you time and effort by allowing you to easily include your Python data in your LaTeX documents.

Join me in this tutorial and learn how to import Python variables into your LaTeX documents in just a few simple steps!

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📝 Useful notes:
To save a variable in Python: save_var_latex("variable_name", 22)
To import a variable in LaTeX: \var{variable_name}

👨‍💻 Source code:
```python
def save_var_latex(key, value):
import csv
import os

dict_var = {}

try:
with open(file_path, newline="") as file:
for row in reader:
dict_var[row[0]] = row[1]
except FileNotFoundError:
pass

dict_var[key] = value

with open(file_path, "w") as f:
```

```latex
% package to open file containing variables
\usepackage{datatool, filecontents}
\DTLsetseparator{,}% Set the separator between the columns.

% import data
\newcommand{\var}[1]{\DTLfetch{mydata}{thekey}{#1}{thevalue}}
```

🎥 Content of this video:
00:00 - What you will learn
02:10 - Python function
04:00 - .dat file
06:00 - LaTeX packages

🔣 Keywords:
#latex #python #variables #dat #LaTeXPython

[giovannyvelasquez]

It was really helpful. I am now implementing these tools in my research's package. Definitely It will save a lot of time. Thank you Federico!

[landisvinchattle]

Nice video. Looking at generating some dynamic formatted images using LaTeX and I'm new to it, this was a quick watch with a lot of good info. Thanks!

[edwinpinerosmonroy]

Thanks Federico, this video is very useful.
But I have a question, if I have a graph that I generate with python, can I export it to the LaTex document?

[Erith]

Hi Federico, thank you very much for your tutorial. It has been very useful to me. However, I have a litter problem when I try to use the \var{key} entity inside a table. Can you help me to make work a table built from several \var{key} entities in its fields? thank in advance for any help

[patrickstaudt]

Hi, Dr. Tartarini. Thanks for making this video! I'm using overleaf to compile and getting a few errors. The first is "Package filecontents Warning: This package is obsolete. Disabling it and passing control to the filecontents environment defined by the LaTeX kernel." The second is "Runaway argument?" on line 120. Line 119 is "\newcommand{\testingtesting}[1]{\DTLfetch{mydata}{thekey}{#1}{thevalue}}", and line 120 is a blank line after 119. I suspect that passing control to the filecontents environment defined by the LaTeX kernel is causing the compiler to not handle line 119 properly. In any case, do you have advice? Thanks again!

Edit: I figured it out! mydata.dat had a "maxdiff, 0.92%" in it. the "%" was causing issues. Thanks again for the video!

[vladimiru]

Great tutorial, thank you!
But what do you think about running python inside LaTex with PythonTeX or PyLuaTeX? Wouldn't it be even better, and wouldn't it give even more features?

[sigurdvingelsgaard]

Hi. I want to show my code with colors etc like in a code editor in my latex doc. The code should not run or do anythong in the document, just stand like in a code editor. Thanks