class_docstr: A reader for markdown corpora whose documents are divided into
  categories based on their file identifiers.
  
  Based on nltk.corpus.reader.plaintext.CategorizedPlaintextCorpusReader:
  https://www.nltk.org/_modules/nltk/corpus/reader/api.html#CategorizedCorpusReader
class_docstr_tok: ["A","reader","for","markdown","corpora","whose","documents","are","divided","into","categories","based","on","their","file","identifiers",".","Based","on","nltk.corpus.reader.plaintext.CategorizedPlaintextCorpusReader",":","https",":","\/\/www.nltk.org\/_modules\/nltk\/corpus\/reader\/api.html","#","CategorizedCorpusReader"]
code: def blockquotes(self, fileids=None, categories=None):
      return self.concatenated_view(
          self.blockquote_reader, fileids, categories
      )
  
imports: from collections import namedtuple
  from functools import partial, wraps
  from nltk.corpus.reader.api import CategorizedCorpusReader
  from nltk.corpus.reader.plaintext import PlaintextCorpusReader
  from nltk.corpus.reader.util import concat, read_blankline_block
  from nltk.tokenize import blankline_tokenize, sent_tokenize, word_tokenize
label_desc: Use image node_id 12 for calling the CategorizedMarkdownCorpusReader obj's underlying member method code with example usage: obj.blockquotes(fileids, categories) and returns: self