google dataflow read from spanner

Question

I am trying to read a table from a Google spanner database, and write it to a text file to do a backup, using google dataflow with the python sdk. I have written the follow

Answer 1

Google currently added support of Backup Spanner with Dataflow, you can choose related template when creating DataFlow job.

For more: https://cloud.google.com/blog/products/gcp/cloud-spanner-adds-import-export-functionality-to-ease-data-movement