Method to anonymise EmbeddedDataFrame

[matweldon]

No description provided.

[SStock1]

@matweldon would you be able to add a description to this.

[matweldon]

The app already does this -- it would just be a convenience function to tidy up the API:

Basically a method that removes any columns except 'bf_indices', 'thresholds' and 'bf_norms' (and a user-provided list of cols to keep)

edf = EmbeddedDataFrame(df, embedder)
edf.anonymise()
# or edf.anonymise(cols_to_keep = ['idx']) to keep the 'idx' column
edf.to_json('path/to/file.json')