chore(python): run blacken session for all directories with a noxfile (#247)

Source-Link: googleapis/synthtool@bc0de6e
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:39ad8c0570e4f5d2d3124a509de4fe975e799e2b97e0f58aed88f8880d5a8b60

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

videointelligence/samples/analyze/beta_snippets.py

@@ -876,14 +876,16 @@ def stream_generator():
     video_streaming_automl_classification_parser.add_argument("model_id")
 
     video_streaming_automl_object_tracking_parser = subparsers.add_parser(
-        "streaming-automl-object-tracking", help=streaming_automl_object_tracking.__doc__
+        "streaming-automl-object-tracking",
+        help=streaming_automl_object_tracking.__doc__,
     )
     video_streaming_automl_object_tracking_parser.add_argument("path")
     video_streaming_automl_object_tracking_parser.add_argument("project_id")
     video_streaming_automl_object_tracking_parser.add_argument("model_id")
 
     video_streaming_automl_action_recognition_parser = subparsers.add_parser(
-        "streaming-automl-action-recognition", help=streaming_automl_action_recognition.__doc__
+        "streaming-automl-action-recognition",
+        help=streaming_automl_action_recognition.__doc__,
     )
     video_streaming_automl_action_recognition_parser.add_argument("path")
     video_streaming_automl_action_recognition_parser.add_argument("project_id")