CSV output should use simple field values for labels (not convoluted JSON) about label-studio-converter

[makseq]

@tomasohara Originally we implemented a CSV export for Choices, not for NER labels. The CSV with labels is produced automatically without any preprocessing (despite to Choices). Yes, maybe it's better to disable export altogether for everything that is not Choices. Or we should make a preprocessing for labels too.

[tomasohara]

OK, thanks for the clarification. The changes are minimal, as shown in the following comparison of the existing convert_to_csv vs. my convert_to_flat_csv: _convert_to_csv_flat-diff-8oct21.

Here's the original and revised functions: _convert_to_csv.txt and _convert_to_csv_flat.txt.

Should I make a push request? I would implement both in the same function with the new behavior governed by an environment variable (e.g., FLATTENED_CSV_ANNOTATIONS).

[tomasohara]

Sorry, I closed it by accident when adding the diff listing. Therefore, I re-opened it.

[makseq]

Yep, pull request would be great!