Merge pull request #128 from akhilmehra/mp_reinvent-2020-r2

Make sure py_version is listed correctly in estimator

Author: TEChopra1000

training/distributed_training/tensorflow/model_parallel/mnist/tensorflow_smmodelparallel_mnist.ipynb

@@ -161,7 +161,7 @@
     "          source_dir=\"utils\",\n",
     "          role=role,\n",
     "          framework_version='2.3.1',\n",
-    "          pv_version='py3',\n",
+    "          py_version='py3',\n",
     "          instance_type='ml.p3.16xlarge',\n",
     "          sagemaker_session=sagemaker_session,\n",
     "          instance_count=1,\n",