code: def load_mlf(filename, utf8_normalization=None):
      
      with codecs.open(filename, 'r', 'string_escape') as f:
          data = f.read().decode('utf8')
          if utf8_normalization:
              data = unicodedata.normalize(utf8_normalization, data)
  
      mlfs = {}
      for mlf_object in HTK_MLF_RE.finditer(data):
          mlfs[mlf_object.group('file')] = [[Label(**mo.groupdict())
                                             for mo
                                             in HTK_HYPOTHESIS_RE.finditer(recognition_data)]
                                            for recognition_data
                                            in re.split(r'\n///\n', mlf_object.group('hypotheses'))]
  
      return mlfs
docs: Load an HTK Master Label File.
  
      :param filename: The filename of the MLF file.
      :param utf8_normalization: None