title: How to use gsutil compose to concatenate Gogole storage objects in python code
body: <p>I know the syntaxt for this
  gsutil compose gs://bucket/obj1 [gs://bucket/obj2 ...] gs://bucket/composite</p>
  
  <p>If anyone could help with the actual python implementation on how to use this in my Python code. thnx</p>
  
  <p>Else if there is a better way to export larger BQ data to GSC ?</p>