Files
lancedb/python/python
Raphael Malikian 0ba70d96c3 fix: add missing stacklevel=2 to warnings.warn() and fix broken message concatenation (Fixes #3563) (#3564)
Fixes #3563

## Summary

- Add `stacklevel=2` to 10 `warnings.warn()` calls across 4 files
- Fix broken message concatenation in `table.py` where the second string
was incorrectly passed as the `category` parameter

## Problem

Multiple `warnings.warn()` calls in the `python/lancedb/` codebase were
missing the `stacklevel` parameter. Without `stacklevel=2`, warnings
point to library internals instead of the caller's code, making it
impossible for users to identify which of their function calls triggered
the warning.

Additionally, two calls in `table.py` (lines 3411 and 3420) had a more
serious bug: the deprecation message was split across two separate
string arguments, causing the second string to be passed as the
`category` parameter instead of being concatenated with the first
string. This would cause `TypeError` when the warning was triggered.

## Changes

| File | Fixes | Description |
|------|-------|-------------|
| `embeddings/colpali.py` | 1 | Add `stacklevel=2` to
`use_token_pooling` deprecation warning |
| `remote/db.py` | 3 | Add `stacklevel=2` to `request_thread_pool`,
`connection_timeout`, `read_timeout` deprecation warnings |
| `remote/table.py` | 3 | Add `stacklevel=2` to `cleanup_old_versions`,
`compact_files`, `optimize` no-op warnings |
| `table.py` | 3 | Fix broken message concatenation for
`data_storage_version` and `enable_v2_manifest_paths` deprecation
warnings + add `stacklevel=2` to `retrain` deprecation warning |

## Verification

```python
# All warnings.warn() calls now have stacklevel
python3 -c "import ast, os; ..."
# Result: All warnings.warn() calls now have stacklevel!
```

## Changelog

| Date | Change | Author |
|------|--------|--------|
| 2026-06-20 | Fix missing stacklevel=2 in 10 warnings.warn() calls +
fix broken message concatenation | rtmalikian |

### Files Changed
- `python/python/lancedb/embeddings/colpali.py` — Add stacklevel=2
- `python/python/lancedb/remote/db.py` — Add stacklevel=2 to 3
deprecation warnings
- `python/python/lancedb/remote/table.py` — Add stacklevel=2 to 3 no-op
warnings
- `python/python/lancedb/table.py` — Fix broken message concatenation +
add stacklevel=2

### Verification
- AST-based audit confirms all `warnings.warn()` calls now include
`stacklevel=2`
- Syntax check passes for all 4 modified files

---

**About the Author:** Raphael Malikian — Clinical AI Solutions
Architect. I specialise in building and fixing AI/ML systems for
healthcare, including vector databases, RAG pipelines, and clinical NLP.
If you need help with your project or think I can add value to your
organisation, feel free to reach out — I'd love to connect.

📧 rtmalikian@gmail.com
🔗 GitHub: https://github.com/rtmalikian
🔗 LinkedIn:
http://www.linkedin.com/in/raphael-t-malikian-mbbs-bsc-hons-71075436a

---

**Disclosure:** This code was developed with assistance from **Hermes
Agent** (Nous Research). All changes were reviewed, tested against the
actual codebase, and verified for correctness.

Signed-off-by: rtmalikian <rtmalikian@gmail.com>
2026-06-23 13:42:59 -07:00
..