How to ARRAY_AGG two columns into one item in SQLAlchemy?

Question

Can anybody suggest how to convert this code into SQLAlchemy code?

ARRAY_AGG(DISTINCT (table.column_a, table.column_b)) AS label

Answer 1

Found the solution

from sqlalchemy import func
func.array_agg(func.distinct(table.column_a, table.column_b)).label('my_label')