@darshan-majithiya had opened #15429 to add the hyperparameter tuning PR but it's gone stale. I'm adding this issue to see if they want to pick it back up, or if not, if someone wants to pick up where they left off in the spirit of open source 😄 
airflow/providers/google/cloud/operators/mlengine.py
#
#
#
"""This module contains Google Cloud MLEngine operators."""
import logging
import re
import warnings
from typing import Dict, List, Optional, Sequence, Union
from airflow.exceptions import AirflowException
from airflow.models import BaseOperator, BaseOperatorLink
from airflow.models.taskinstance import TaskInstance
from airflow.providers.google.cloud.hooks.mlengine import MLEngineHook
log = logging.getLogger(__name__)
def _normalize_mlengine_job_id(job_id: str) -> str: