code: def __init__(self, root, tagset=None):
      CorpusReader.__init__(self, root, self._FILES)
      self._tagset = tagset
  
imports: import re
  from nltk.corpus.reader.api import *
  from nltk.corpus.reader.util import *
  from nltk.tag import map_tag, str2tuple
label_desc: Use image node_id 1 to create a new SwitchboardCorpusReader object from inherited base classes: CorpusReader with example: obj = SwitchboardCorpusReader(root, tagset)