The seaborn workbench

The Seaborn app is a Python editor that runs in WebAssembly (Pyodide). When the status line says seaborn is ready, these names already exist:

• pd — pandas
• np — NumPy
• sns — seaborn
• plt — matplotlib.pyplot

You do not write the imports unless you want to. The workbench already called sns.set_theme().

Run code

Paste into the editor and press Ctrl+Enter (Windows/Linux) or Cmd+Enter (macOS). The console is stdout. The Plot panel is for figures.

print("pandas", pd.__version__)
print("seaborn", sns.__version__)
df = pd.DataFrame({"x": [1, 2, 3], "y": [1, 4, 9]})
sns.scatterplot(data=df, x="x", y="y")
plt.title("n squared")
plt.show()

You should see a version pair in the console and points in the Plot panel.

plt.show() is required

This is not Jupyter. A bare sns.scatterplot(...) does not display. End every script with plt.show(), including after relplot, catplot, pairplot, and displot.

Files live in /uploads

Click Add files and choose a CSV. After that:

import os

print(os.listdir("/uploads"))

Readable paths: sales.csv or /uploads/sales.csv.

Writes become download chips

import os

df = pd.DataFrame({"city": ["Nairobi", "Mombasa"], "units": [19, 13]})
sns.barplot(data=df, x="city", y="units")
plt.title("demo")
plt.savefig("demo.png", dpi=100, bbox_inches="tight")
plt.show()
print("wrote demo.png")
print(os.listdir("/uploads"))

After Run, click ↓ on the file chip. Nothing is uploaded to Swiftener’s servers.

Reset, autosave, snippets

• Code autosaves in this browser.
• Reset restores the starter snippet — it does not delete /uploads.
• Clear on the Plot panel removes figures without resetting the editor.

Privacy

Python runs in this tab. Uploads live in IndexedDB on this device. Lesson pages are public HTML; they never see your figures.