in pipelines/cdp/cdp_pipeline/customer_data_platform.py [0:0]
def _unify_data(pcolls: tuple[PCollection, PCollection]) -> PCollection[str]:
transactions_pcoll, coupons_redempt_pcoll = pcolls
unified_data = ((transactions_pcoll, coupons_redempt_pcoll)
| "Combine Transactions and Coupons" >> beam.CoGroupByKey()
| beam.FlatMap(left_join))
return unified_data