lyst / lyst/lightfm

LightFM .fit() (loss)

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Description

Hi,

I am using LightFM with Python 3.12.4.

I can use `loss='logistic'` without any issue, but when I try to use `loss='warp'` or `loss='bpr'`, it fails.

I got silently stopped

To try to fix it, I installed the latest version from GitHub using:
```

pip install git+[https://github.com/daviddavo/lightfm](https://github.com/daviddavo/lightfm)

```
However, the problem persists.

Could you please advise how to properly enable WARP and BPR losses in this setup?

Environment:
- Python 3.12.4
- LightFM unknown version
- OS: Windows 11

Thanks!
```

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing LightFM .fit() with loss='warp' and loss='bpr' on Python 3.12.4 and Windows 11, recording the LightFM version and the exact behavior or output. Compare this with loss='logistic'; done means the failure is reproducible and its cause or a verified fix is documented.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
machine-learning
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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