Add the first util class to the vertex_vision_model_garden repo. (#1978)

* Add the first util class to the vertex-vision-model-garden repo

* Updated file names.

* Delete the 1st incorrect file set.

* Add the codeowners

* Revised the file folder structures.

community-content/CODEOWNERS

@@ -10,3 +10,4 @@
 /pipeline_components @Ark-kun
 /pipeline_components/image_ml_model_training @lakeyk
 /prediction_featurestore_integration @googleapis/vertex-prediction-team
+/vertex_vision_model_garden/model_oss/util @weigary

community-content/vertex_vision_model_garden/model_oss/util/hypertune_util.py

@@ -0,0 +1,21 @@
+"""Utility functions for Vertex Hyperparameter Tuning Jobs."""
+
+import os
+
+from absl import logging
+
+_ENVIRONMENT_VARIABLE_FOR_TRIAL_ID = 'CLOUD_ML_TRIAL_ID'
+
+
+def get_trial_id_from_environment() -> str:
+  """Gets the trial id from environment variable.
+
+  Returns:
+    The trial id from environement or '0' if not found.
+  """
+  if _ENVIRONMENT_VARIABLE_FOR_TRIAL_ID not in os.environ:
+    logging.warning(
+        'Environment variable %s not found, return 0 as default trial id.',
+        _ENVIRONMENT_VARIABLE_FOR_TRIAL_ID,
+    )
+  return os.environ.get(_ENVIRONMENT_VARIABLE_FOR_TRIAL_ID, '0')