Cannot display "application/vnd.dataresource+json"

[scarf005]

Applies To

• Notebooks (.ipynb files)
• Interactive Window and/or Cell Scripts (.py files with #%% markers)

What happened?

Minimal Reproduction

1. install deno
2. enable deno's jupyter kernel
3. write following .ipynb file and open in vscode.

import pl from "npm:nodejs-polars"
import { display } from "https://deno.land/x/display@v1.1.2/mod.ts"

const df = pl.DataFrame({
	fruit: ["Apples", "Oranges"],
	comparability: [0, 1],
})
await display(df)
df

Expected behavior (Jupyter Lab)

Actual behaivor (VSCode)

The workaround

Preprocessing

With help of denoland/vscode_deno#1014, found out that the display function sent data to jupyter in following format:

message_type: "display_data",
data: {
    "application/vnd.dataresource+json": { data: [ [Object], [Object] ], schema: { fields: [Array] } },
    "text/html": "<table><thead><tr><th>fruit</th><th>comparability</th></tr></thead><tbody><tr><td>Apples</td><td>0</"... 59 more characters
  },
  metadata: {},
  transient: {}
}

Removing "application/vnd.dataresource+json" field fixes it.

Changing presentation

Changing presentation from application/vnd.dataresource+json to text/html fixes it.

However this issue is still problematic because:

• mimetype application/vnd.dataresource+json is not recognized as JSON
• data in unrecognized mimetype renders as empty, which is confusing to encounter and hard to figure out the cause
• most of the time users would probably want HTML output to have the highest priority
• the behaviour of VSCode extension differs from jupyter lab

VS Code Version

1.85.1 (Universal)

Jupyter Extension Version

v2024.1.2024010901

Jupyter logs

18:56:13.795 [info] Restart requested ~/repo/polars/main.ipynb
18:56:13.796 [info] Dispose Kernel process 24186.
18:56:13.801 [warn] StdErr from Kernel Process Client disconnected PeerIdentity(b"XXXXXX")
18:56:13.807 [info] Launching Raw Kernel Deno # ~/.local/share/deno/bin/deno
18:56:13.808 [info] Process Execution: ~/.local/share/deno/bin/deno --unstable jupyter --kernel --conn ~/Library/Jupyter/runtime/kernel-v2-XXXXXX.json
    > cwd: ~/repo/polars
18:56:14.018 [info] Restarted XXXXXX-XXXXXX-XXXXXX-XXXXXX-XXXXXX
18:56:16.874 [info] Handle Execution of Cells 0 for ~/repo/polars/main.ipynb
18:56:16.875 [info] Kernel acknowledged execution of cell 0 @ 1704794176875
18:56:16.922 [info] End cell 0 execution after 0.047s, completed @ 1704794176922, started @ 1704794176875

Coding Language and Runtime Version

deno 1.39.2 (release, aarch64-apple-darwin), typescript 5.3.3

Language Extension Version (if applicable)

Deno, v3.31.0

Anaconda Version (if applicable)

No response

Running Jupyter locally or remotely?

Local

[DonJayamanne]

Duplicate of microsoft/vscode-notebook-renderers#189