FbankOpts (and others) conversion to/from dict

[pzelasko]

Would it be possible to add a conversion mechanism for the Opts classes to/from dict? It would make it much easier for me to integrate kaldifeat in Lhotse. I'm using dataclasses for configuration of all feature extractors, like this:

https://github.com/lhotse-speech/lhotse/blob/f5bd2063291b7d789d4b8a2a50396d2ffa76eb2c/lhotse/features/fbank.py#L9-L31

Example API could look like this:

# Read a dict
config = {"frame_shift": 0.012, "use_energy": True}
extractor = kaldifeat.Fbank(kaldifeat.FbankOptions.from_dict(config))

# Store to a dict
config2 = extractor.opts.to_dict()
# config2 = {... a list of all settings ...}

[csukuangfj]

Yes, it's doable. Will add it tomorrow.

[csukuangfj]

@pzelasko
Please install kaldifeat v1.8 from PyPI, i.e.,

pip install -v kaldifeat==1.8

---

Fixed and merged in #9

[pzelasko]

Thanks, will check it out!

[pzelasko]

It works.