One Markdown escape.
One reproducible failure.

Independent sample · checked 22 October 2026 · no affiliation with LanceDB

Observed

The Python table-creation call in LanceDB’s Markdown quickstart contains an escaped underscore. Copied verbatim into Python, the line fails during parsing:

table = db.create\_table("characters", data=data, mode="overwrite")

SyntaxError: unexpected character after line continuation character

Proposed correction

Serve Python inside fenced code blocks, preserving literal identifiers without Markdown escaping. Add a check that extracts Python snippets from the served Markdown and compiles them.

Control and limits

Removing the escape makes this line compile. An independent control created a local table, searched two synthetic vectors, filtered a nested field, and converted the result to Polars successfully.

Environment: Ubuntu x86_64, Python 3.12.3, LanceDB 0.40.0, Polars 2.0.0, PyArrow 26.0.0. No paid APIs or remote database.

This is a copyability defect in the Markdown path. An agent can repair the escaping; we have not measured failed onboarding or lost revenue. Browser copy-button behavior and other environments were not tested.

Dated result, source hash, and control output (JSON) · Reproduction script

Request a check for your quickstart →