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docs(python): fill gaps in the Python API reference (#3746)

Browse Source 
`docs/src/python/python.md` is the whole Python API reference, but it is
maintained by hand and had drifted from the public API. Anything not
listed there simply doesn't get rendered, so a number of public,
documented, tested APIs were invisible to users — most notably branch
management, where `diff` and `merge` live.

I audited every public symbol reachable from `lancedb` and its
subpackages against the `:::` directives on the page. This adds the
missing ones:

- **Branching** — `Branches`, `AsyncBranches` (`list` / `create` /
`checkout` / `delete` / `diff` / `merge`)
- **Tables** — `TableStatistics` (returned by `Table.stats()`; the
fragment-level stats classes were already listed)
- **Full text queries** — `FullTextQuery`, `MatchQuery`, `PhraseQuery`,
`BoostQuery`, `MultiMatchQuery`, `BooleanQuery`, `FullTextOperator`,
`Occur`
- **Querying** — `LanceEmptyQueryBuilder`, `LanceTakeQueryBuilder`,
`AsyncTakeQuery`
- **Indices** — `Fm` (the FM-index for substring search), `IndexConfig`
- **Blobs** — `blob`, `BlobType`, `BlobFile`
- **Namespaces** — `connect_namespace`, `connect_namespace_async`, and
both namespace connection classes
- **Remote config** — `TlsConfig`, `HeaderProvider`, `OAuthConfig`,
`OAuthFlowType`
- **Rerankers** — the `Reranker` base class plus `JinaReranker`,
`RRFReranker`, `MRRReranker`, `AnswerdotaiRerankers`,
`VoyageAIReranker`, `WatsonxReranker` (5 of 12 were listed)
- **Embeddings** — `get_registry`, `register`, and the 14 embedding
functions that were missing (3 of 17 were listed)
- **PyTorch** — `StreamingDataset` and the permutation API it is built
on
- **Misc** — `Session`, `tokenize`, `FtsToken`, `pydantic.Vector`,
`pydantic.MultiVector`, `instrument_lancedb_metrics`, and the two
exception types

It also repairs cross-references in docstrings that no longer resolve:
links into guide pages that have since moved to lancedb.com
(`querying-an-ann-index`, `experimental-full-text-search`),
`lance.dataset` references with no inventory behind them, and the
relative targets `[Table](Table)` and `[PyArrow Table](pyarrow.Table)`.

Deliberately left out: concrete implementation classes reached through
their abstract base (`LanceTable`, `LanceDBConnection`,
`RemoteDBConnection`), query base classes already covered by
`inherited_members: true`, and internal plumbing such as
`FullTextSearchQuery` and `ColumnOrdering`.

## Testing

The docs job only runs on pushes to `main`, so I built the site locally
and compared against a build of `upstream/main`: every added entry
resolves, and no symbol that was rendered before stopped being rendered
when the four packages moved to automodule. `mkdocs build --strict`
exits 0 on this branch, against 61 warnings on `main`.

## Also in this PR

`lancedb.index`, `lancedb.embeddings`, `lancedb.remote` and
`lancedb.rerankers` are now rendered by a single mkdocstrings directive
each, driven by the module's `__all__`, rather than a hand-maintained
list. These four are where most of the drift was, and `__all__` is
harder to forget than a docs page. `lancedb.embeddings` had no
`__all__`; without one mkdocstrings renders no members at all for a
re-export package, so one is added. AGENTS.md gains a section on how the
page is wired up and how to build the docs locally.

Rendering all that code for the first time surfaced ~100 more build
warnings, which would have made #3707 (turning on `mkdocs build
--strict`) harder to land, so the warning backlog is cleared here too.
97 of the 158 warnings were one systematic false positive — griffe
cannot see the generated `__init__` of a pydantic dataclass, so every
documented parameter looks unknown — switched off via
`warn_unknown_params`. The remaining 61 came from 15 docstrings with
real bugs: prose trailing a `Parameters` section (we were rendering
parameters called `The`, `you` and `To`), types dropped because numpydoc
needs spaces around the colon, `num_partitions, default sqrt(num_rows)`
parsing as a list of names and inventing a `default` parameter, and one
parameter indented five spaces. `mkdocs build --strict` now exits 0.

---

#3747 (the coverage test that keeps this from happening again) is
stacked on this branch, so review it after this one.

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Will Jones
2026-07-30 16:50:05 -07:00
committed by GitHub
parent 48945d0658
commit 5a1015ba72
24 changed files with 309 additions and 151 deletions
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docs/src/python/python.md
+114 -49
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@@ -26,6 +26,18 @@ is also an [asynchronous API client](#connections-asynchronous).
::: lancedb.db.DBConnection
::: lancedb.Session
## Namespaces (Synchronous)
A namespace-backed connection resolves tables through a
[Lance namespace](https://lancedb.github.io/lance-namespace/) service instead of
listing a storage directory.
::: lancedb.connect_namespace
::: lancedb.namespace.LanceNamespaceDBConnection
## Tables (Synchronous)
::: lancedb.table.Table
@@ -34,8 +46,12 @@ is also an [asynchronous API client](#connections-asynchronous).
::: lancedb.table.FragmentSummaryStats
::: lancedb.table.TableStatistics
::: lancedb.table.Tags
::: lancedb.table.Branches
## Expressions
Type-safe expression builder for filters and projections. Use these instead
@@ -62,29 +78,46 @@ of raw SQL strings with [where][lancedb.query.LanceQueryBuilder.where] and
::: lancedb.query.LanceHybridQueryBuilder
::: lancedb.query.LanceEmptyQueryBuilder
::: lancedb.query.LanceTakeQueryBuilder
## Full text queries
Structured full text queries can be passed to
[Table.search][lancedb.table.Table.search] or
[AsyncTable.search][lancedb.table.AsyncTable.search] in place of a query string,
and combined with [BooleanQuery][lancedb.query.BooleanQuery].
::: lancedb.query.FullTextQuery
::: lancedb.query.MatchQuery
::: lancedb.query.PhraseQuery
::: lancedb.query.BoostQuery
::: lancedb.query.MultiMatchQuery
::: lancedb.query.BooleanQuery
::: lancedb.query.FullTextOperator
::: lancedb.query.Occur
## Embeddings
::: lancedb.embeddings.registry.EmbeddingFunctionRegistry
::: lancedb.embeddings.base.EmbeddingFunctionConfig
::: lancedb.embeddings.base.EmbeddingFunction
::: lancedb.embeddings.base.TextEmbeddingFunction
::: lancedb.embeddings.sentence_transformers.SentenceTransformerEmbeddings
::: lancedb.embeddings.openai.OpenAIEmbeddings
::: lancedb.embeddings.open_clip.OpenClipEmbeddings
::: lancedb.embeddings
options:
show_root_heading: false
show_root_toc_entry: false
## Remote configuration
::: lancedb.remote.ClientConfig
::: lancedb.remote.TimeoutConfig
::: lancedb.remote.RetryConfig
::: lancedb.remote
options:
show_root_heading: false
show_root_toc_entry: false
## Context
@@ -122,7 +155,22 @@ tokens = list(lancedb.tokenize("acme makes searchable data",
custom_stop_words=["acme"]))
```
::: lancedb.index.FTS
::: lancedb.tokenize
::: lancedb.FtsToken
## Blobs
Blob columns store large binary values out of line so they can be read lazily
instead of being materialized with the rest of the row.
::: lancedb.blob
::: lancedb.BlobType
::: lancedb._blob.BlobFile
options:
show_root_full_path: false
## Utilities
@@ -130,6 +178,14 @@ tokens = list(lancedb.tokenize("acme makes searchable data",
::: lancedb.merge.LanceMergeInsertBuilder
::: lancedb.otel.instrument_lancedb_metrics
## Exceptions
::: lancedb.exceptions.MissingValueError
::: lancedb.exceptions.MissingColumnError
## Integrations
## Pydantic
@@ -138,19 +194,30 @@ tokens = list(lancedb.tokenize("acme makes searchable data",
::: lancedb.pydantic.vector
::: lancedb.pydantic.Vector
::: lancedb.pydantic.MultiVector
::: lancedb.pydantic.LanceModel
## PyTorch
::: lancedb.streaming.StreamingDataset
::: lancedb.permutation.permutation_builder
::: lancedb.permutation.PermutationBuilder
::: lancedb.permutation.Permutation
::: lancedb.permutation.Transforms
## Reranking
::: lancedb.rerankers.linear_combination.LinearCombinationReranker
::: lancedb.rerankers.cohere.CohereReranker
::: lancedb.rerankers.colbert.ColbertReranker
::: lancedb.rerankers.cross_encoder.CrossEncoderReranker
::: lancedb.rerankers.openai.OpenaiReranker
::: lancedb.rerankers
options:
show_root_heading: false
show_root_toc_entry: false
## Connections (Asynchronous)
@@ -161,6 +228,12 @@ can be used to create, list, or open tables.
::: lancedb.db.AsyncConnection
## Namespaces (Asynchronous)
::: lancedb.connect_namespace_async
::: lancedb.namespace.AsyncLanceNamespaceDBConnection
## Tables (Asynchronous)
Table hold your actual data as a collection of records / rows.
@@ -169,32 +242,20 @@ Table hold your actual data as a collection of records / rows.
::: lancedb.table.AsyncTags
::: lancedb.table.AsyncBranches
## Indices (Asynchronous)
Indices can be created on a table to speed up queries. This section
lists the indices that LanceDb supports.
::: lancedb.index.BTree
::: lancedb.index.Bitmap
::: lancedb.index.LabelList
::: lancedb.index.FTS
::: lancedb.index.IvfPq
::: lancedb.index.HnswPq
::: lancedb.index.HnswSq
::: lancedb.index.IvfFlat
::: lancedb.index.IvfSq
::: lancedb.index.IvfRq
::: lancedb.index.HnswFlat
::: lancedb.index
options:
show_root_heading: false
show_root_toc_entry: false
# `lang_mapping` is defined in the module rather than imported, so it is
# picked up despite not being in `__all__`. It is an internal lookup table.
filters: ["!^_", "!^lang_mapping$"]
::: lancedb.table.IndexStatistics
@@ -222,3 +283,7 @@ rows nearest to a query vector and can be created with the
::: lancedb.query.AsyncHybridQuery
options:
inherited_members: true
::: lancedb.query.AsyncTakeQuery
options:
inherited_members: true