def get_file(self, fileid):
		if not fileid.startswith(self.full_path):
			fileid = os.path.join(self.full_path, fileid)
		
		if self.files not in fileid:
			self.files[fileid] = codecs.open(fileid, self.mode, self.encoding)
		
		return self.files[fileid]
dataset/ETHPy150Open japerk/nltk-trainer/nltk_trainer/writer/__init__.py/CorpusWriter.get_file/swapped operands of `not in`