code: def get_file(self, fileid):
      if not fileid.startswith(self.full_path):
          fileid = os.path.join(self.full_path, fileid)
  
      if fileid not in self.files:
          self.files[fileid] = codecs.open(
              fileid, self.mode, self.encoding
          )
  
      return self.files[fileid]
  
file_path: nltk-trainer/nltk_trainer/writer/__init__.py
imports: import codecs, collections, os, os.path
label_desc: Use image node_id 2 for calling the CorpusWriter obj's underlying member method code with example usage: obj.get_file(fileid) and returns: self