class_docstr: TFCompression Test
class_docstr_tok: ["TFCompression","Test"]
code: def _CreateFiles(self, options=None, prefix=""):
      filenames = []
      for i in range(self._num_files):
          name = prefix + "tfrecord.%d.txt" % i
          records = [
              self._Record(i, j) for j in range(self._num_records)
          ]
          fn = self._WriteRecordsToFile(records, name, options)
          filenames.append(fn)
      return filenames
  
imports: import gzip
  import os
  import random
  import string
  import zlib
  import six
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.lib.io import tf_record
  from tensorflow.python.platform import test
  from tensorflow.python.util import compat
label_desc: Use image node_id 3 for calling the TFCompressionTestCase obj's underlying member method code with example usage: obj._CreateFiles(options, prefix) and returns: filenames