### 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)
### What problem does this PR solve?
Delete files from a knowledge base.
#717
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
api_app.py
/document/upload
add two non mandatory parameters
parser_id:
[naive,qaresume,manual,table,paper,book,laws,presentation,picture,one]
run: 1
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
Add upload file by knowledge base name API. (#539)
### What problem does this PR solve?
Add upload file by knowledge base name API.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
- [x] Documentation Update
---------
Co-authored-by: chrysanthemum-boy <fannc@qq.com>
Kung Quang
H
Kevin Hu
GYH
chrysanthemum-boy