code: def _get_y_and_populate_category_idx_store(self):
      return np.array(
          self._df[self._category_col]
          .apply(str)
          .apply(self._category_idx_store.getidx)
      )
  
file_path: scattertext/scattertext/CorpusFromFeatureDict.py
imports: import numpy
  from scattertext.CorpusDF import CorpusDF
  from scattertext.CSRMatrixTools import CSRMatrixFactory
  from scattertext.ParsedCorpus import ParsedCorpus
  from scattertext.indexstore.IndexStore import IndexStore
label_desc: Use image node_id 3 for calling the CorpusFromFeatureDict obj's underlying member method code with example usage: obj._get_y_and_populate_category_idx_store() and returns: np