TypeError: can only concatenate str (not "list") to str

[nvinayvarma189]

Issue

1. I used this script to apply new Charon format to the old dataset.

2. Later, when I tried to train a model, I receive the below error

 File "/root/.pyenv/versions/3.8.2/envs/tvs_india2/lib/python3.8/site-packages/dialogy/plugins/text/duckling_plugin/__init__.py", line 501, in transform
    row[self.output_column] + entities
TypeError: can only concatenate str (not "list") to str

3. This is because the entities column (in the new Charon output format) has lists as strings( "[]" instead of [] ) so it breaks.

Possible solutions

1. Replace row[self.output_column] + entities with json.loads(row[self.output_column]) + entities here and in dialogy here.
2. Set use_transform=False for dukcling and list entity plugins in [processor.py](https://github.com/skit-ai/dialogy-template-simple-transformers/blob/main/slu/slu/src/controller/processors.py)

I think solution 1 is the proper fix.

credits: @biswaroop1547