Kung Quang 32d5885b68
Fix api reference empty bug (#1655)
### What problem does this PR solve?

fix api reference empty bug
```
for chunk_i in answer['reference'].get('chunks',[]):
                   ^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'list' object has no attribute 'get'
```
```
return np.array([d["relevance_score"] for d in res["results"]]), res["meta"]["tokens"]["input_tokens"]+res["meta"]["tokens"]["output_tokens"]
                                                   ~~~^^^^^^^^^^^
KeyError: 'results'
```
### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
2024-07-24 18:02:22 +08:00
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