title: Trigger python codes from google cloud bucket to run against CSV file from another bucket
body: <p>I have few python scripts which will process CSV files sent to a cloud bucket and uploads the output file into another bucket. 
  1. <strong>init</strong>.py (main file) 2. google_client.py (Reads input file and upload output file) 3. DP_Workflow.py (submit file to DP workflow to generate output file) </p>
  
  <p>This works fine locally, But I am trying to find ways to get this uploaded into a bucket and run it against CSV file whenever gets uploaded in another bucket. Is there a way to trigger these files at once? </p>