code: def _clean_and_filter_nulls_and_empties_from_dataframe(self):
      df = self.data_frame.loc[
          self.data_frame[[self._text_col]].dropna().index
      ]
      df = df[df[self._text_col] != ""].reset_index()
      return df
  
imports: import numpy
  import pandas
  from scattertext.AsianNLP import chinese_nlp
  from scattertext.CSRMatrixTools import CSRMatrixFactory
  from scattertext.TermDocMatrix import TermDocMatrix
  from scattertext.TermDocMatrixFactory import TermDocMatrixFactory
  from scattertext.TermDocMatrixWithoutCategories import TermDocMatrixWithoutCategories
  from scattertext.indexstore.IndexStore import IndexStore
label_desc: Use image node_id 4 for calling the TermDocMatrixWithoutCategoriesFromPandas obj's underlying member method code with example usage: obj._clean_and_filter_nulls_and_empties_from_dataframe() and returns: df