Fix broken Guitar benchmark target //learning/brain/contrib/data:csv_dataset_benchmark and //learning/brain/contrib/data:map_and_batch_benchmark.

PiperOrigin-RevId: 286513162
Change-Id: I74441fd6b478af8ecc33a5cd1a3ef1b3ed2cda14

tensorflow/python/data/experimental/benchmarks/csv_dataset_benchmark.py

@@ -51,7 +51,7 @@ class CsvDatasetBenchmark(test.Benchmark):
     self._filenames = []
     for n in self._num_cols:
       fn = os.path.join(self._temp_dir, 'file%d.csv' % n)
-      with open(fn, 'wb') as f:
+      with open(fn, 'w') as f:
         # Just write 100 rows and use `repeat`... Assumes the cost
         # of creating an iterator is not significant
         row = ','.join(str_val for _ in range(n))

tensorflow/python/data/experimental/benchmarks/map_and_batch_benchmark.py

@@ -116,7 +116,7 @@ class MapAndBatchBenchmark(test.Benchmark):
     def name(method, label, num_calls, inter_op, element_size, batch_size):
       return ("%s_id_%s_num_calls_%d_inter_op_%d_elem_size_%d_batch_size_%d" % (
           method,
-          hashlib.sha1(label).hexdigest()[:8],
+          hashlib.sha1((label).encode("utf-8")).hexdigest()[:8],
           num_calls,
           inter_op,
           element_size,