Clearly demarcate contrib symbols from standard tf symbols by importing them directly.

PiperOrigin-RevId: 285618209

official/recommendation/neumf_model.py

@@ -115,8 +115,7 @@ def neumf_model_fn(features, labels, mode, params):
         beta2=params["beta2"],
         epsilon=params["epsilon"])
     if params["use_tpu"]:
-      # TODO(seemuch): remove this contrib import
-      optimizer = tf.contrib.tpu.CrossShardOptimizer(optimizer)
+      optimizer = tf.compat.v1.tpu.CrossShardOptimizer(optimizer)
 
     mlperf_helper.ncf_print(key=mlperf_helper.TAGS.MODEL_HP_LOSS_FN,
                             value=mlperf_helper.TAGS.BCE)
@@ -274,7 +273,7 @@ def _get_estimator_spec_with_metrics(logits,              # type: tf.Tensor
       use_tpu_spec)
 
   if use_tpu_spec:
-    return tf.contrib.tpu.TPUEstimatorSpec(
+    return tf.estimator.tpu.TPUEstimatorSpec(
         mode=tf.estimator.ModeKeys.EVAL,
         loss=cross_entropy,
         eval_metrics=(metric_fn, [in_top_k, ndcg, metric_weights]))

official/utils/misc/distribution_utils.py

@@ -283,14 +283,6 @@ def set_up_synthetic_data():
   _monkey_patch_dataset_method(tf.distribute.MirroredStrategy)
   _monkey_patch_dataset_method(
       tf.distribute.experimental.MultiWorkerMirroredStrategy)
-  # TODO(tobyboyd): Remove when contrib.distribute is all in core.
-  if hasattr(tf, 'contrib'):
-    _monkey_patch_dataset_method(tf.contrib.distribute.MirroredStrategy)
-    _monkey_patch_dataset_method(tf.contrib.distribute.OneDeviceStrategy)
-    _monkey_patch_dataset_method(
-        tf.contrib.distribute.CollectiveAllReduceStrategy)
-  else:
-    print('Contrib missing: Skip monkey patch tf.contrib.distribute.*')
 
 
 def undo_set_up_synthetic_data():
@@ -298,14 +290,6 @@ def undo_set_up_synthetic_data():
   _undo_monkey_patch_dataset_method(tf.distribute.MirroredStrategy)
   _undo_monkey_patch_dataset_method(
       tf.distribute.experimental.MultiWorkerMirroredStrategy)
-  # TODO(tobyboyd): Remove when contrib.distribute is all in core.
-  if hasattr(tf, 'contrib'):
-    _undo_monkey_patch_dataset_method(tf.contrib.distribute.MirroredStrategy)
-    _undo_monkey_patch_dataset_method(tf.contrib.distribute.OneDeviceStrategy)
-    _undo_monkey_patch_dataset_method(
-        tf.contrib.distribute.CollectiveAllReduceStrategy)
-  else:
-    print('Contrib missing: Skip remove monkey patch tf.contrib.distribute.*')
 
 
 def configure_cluster(worker_hosts=None, task_index=-1):