Replace data rows with global keys

Author: ovalle15

examples/prediction_upload/video_predictions.ipynb

@@ -478,7 +478,7 @@
         "    \"global_key\": global_key\n",
         "}\n",
         "dataset = client.create_dataset(name=\"video_prediction_demo\")\n",
-        "task = dataset.create_data_row(test_img_url)\n",
+        "task = dataset.create_data_rows([test_img_url])\n",
         "task.wait_till_done()\n",
         "print(\"Errors: \",task.errors)\n",
         "print(\"Failed data rows: \",task.failed_data_rows)"