# HVC workflow in detail This document explains in detail how functions and modules work, mainly as a reference for developers.

Take the example code from the intro notes page: ```Python import hvc

hvc.extract(‘extract_config.yml’) hvc.select(‘select_config.yml’) hvc.predict(‘predict_config.yml’) ```

Here’s a step-by-step outline of what happens under the hood: - import hvc

• automatically imports featureextract, labelpredict, and

modelselect modules

• specifically, the extract, predict, and select functions

from their respective modules

• hvc.extract(‘extract_config.yml’)

• first parse.extract parses the config file

• for each element in todo_list from config + for each data directory datadir in todo_list:

  • change to that directory
  • get all the audio files in that directory with glob
  • for each audo file: + run features.extract.from_file + add extracted features to features_from_all_files

• save all features in an output file

• hvc.select(‘select_config.yml’)
• hvc.predict(‘predict_config.yml’)