Python Runner

Run a Python script in your project and save what it writes, such as figures for your document.

Python scripts run in your browser, so the output appears right below the editor. Nothing needs to be set up.

1. Create a script

   In the file tree, click the New file icon. Enter a name that ends in .py and click Create.

   

   A new Python file

   The Run button and an output pane appear below the editor. The first time, the button stays disabled while Python loads.

2. Run it

   Write your code and click Run. What the script prints appears in the output pane. You don’t have to save first.

   Files the script writes go into your project. A message tells you which, for example results.txt saved to your project, and the file appears in the file tree.

   

   The output and a saved file

3. Stop a script

   While a script runs, Run becomes Stop. Click it to interrupt the script. The output pane ends with Execution interrupted.

   

   A running script

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Use a figure in your document

Plots have no window to appear in, so save them to a file. For example:

import matplotlib.pyplot as plt

plt.plot([1, 2, 3], [1, 4, 9])
plt.savefig("figure.png")

figure.png appears in your project, ready for \includegraphics{figure.png}.

A saved plot

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Read your project’s files

A script can open the files of your project by their path:

print(open("results.txt").read())

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If something goes wrong

The script raises an error. The error appears in red in the output pane, after anything the script printed before it.

An error in a script

ModuleNotFoundError: No module named .... Only the packages built into Pyodide are available, and packages installed with pip cannot be used. NumPy and Matplotlib are among those available, and the message links to the full list.

A package that is not available