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docs: replace pylance calls with native lancedb equivalents (#4811)

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Replace the remaining `pylance` (`take_blobs`) snippet in the LeRobot
integration guide with `Table.fetch_blob_files`, document how to open
`.lance` datasets directly with `lancedb` alongside a
`pylance`-to-`lancedb` call mapping on `/basics/lance`, and clarify in
installation docs that the optional `pylance` extra is only needed for
engine/connector authors or format-level fragment APIs.
This commit is contained in:
Xuanwo
2026-11-04 00:58:05 +08:00
committed by GitHub
parent 8d10f25121
commit 28ba34998a
4 changed files with 44 additions and 7 deletions
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python/README.md
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@@ -20,7 +20,7 @@ For those hosts, install the `lancedb-compat` package instead:
pip install lancedb-compat
```
Same Python API (`import lancedb` works as usual). The compat wheel is compiled at the `x86-64-v2` baseline (Nehalem-class) and uses runtime SIMD dispatch in the embedded lance crate to pick the right kernel tier (scalar / AVX / AVX+FMA / AVX2+FMA / AVX-512) at load time, so it still goes fast on modern hardware while running cleanly on the pre-Haswell silicon. Use `lance.simd_info()` from Python to verify which tier was selected.
Same Python API (`import lancedb` works as usual). The compat wheel is compiled at the `x86-64-v2` baseline (Nehalem-class) and uses runtime SIMD dispatch in the embedded lance crate to pick the right kernel tier (scalar / AVX / AVX+FMA / AVX2+FMA / AVX-512) at load time, so it still goes fast on modern hardware while running cleanly on the pre-Haswell silicon (if `pylance` is installed, `lance.simd_info()` reports which tier was selected).
`lancedb` and `lancedb-compat` install to the same `lancedb/` namespace and conflict at install time. Pick one. To switch, `pip uninstall lancedb` first, then `pip install lancedb-compat` (or vice-versa).
@@ -40,8 +40,10 @@ Stable releases are created about every 2 weeks. For the latest features and bug
pip install --pre --extra-index-url https://pypi.fury.io/lancedb/ lancedb
```
If you also need the optional `lance` Python API, install the `pylance` extra
and include the Lance preview index:
Most applications only need `lancedb`. Install the optional `pylance` extra and
include the Lance preview index only when building query engines or connectors,
calling format-level `lance` APIs directly, or converting plain-scan lazy or
legacy blob columns with `to_pandas()`:
```bash
pip install --pre \