class_docstr: Corpus reader for the York-Toronto-Helsinki Parsed Corpus of Old
  English Prose (YCOE), a 1.5 million word syntactically-annotated
  corpus of Old English prose texts.
class_docstr_tok: ["Corpus","reader","for","the","York-Toronto-Helsinki","Parsed","Corpus","of","Old","English","Prose","(","YCOE",")",",","a","1.5","million","word","syntactically-annotated","corpus","of","Old","English","prose","texts","."]
docstr: Return a list of file identifiers for the files that make up
  this corpus, or that store the given document(s) if specified.
docstr_tok: ["Return","a","list","of","file","identifiers","for","the","files","that","make","up","this","corpus",",","or","that","store","the","given","document","(","s",")","if","specified","."]
code: def fileids(self, documents=None):
      """
      Return a list of file identifiers for the files that make up
      this corpus, or that store the given document(s) if specified.
      """
      if documents is None:
          return self._fileids
      elif isinstance(documents, str):
          documents = [documents]
      return sorted(
          set(
              ["%s.pos" % doc for doc in documents]
              + ["%s.psd" % doc for doc in documents]
          )
      )
  
imports: import os
  import re
  from nltk.corpus.reader.api import *
  from nltk.corpus.reader.bracket_parse import BracketParseCorpusReader
  from nltk.corpus.reader.tagged import TaggedCorpusReader
  from nltk.corpus.reader.util import *
  from nltk.tokenize import RegexpTokenizer
label_desc: Use image node_id 3 for calling the YCOECorpusReader obj's underlying member method code with example usage: obj.fileids(documents) and returns: sorted, self