sqlachemy_update_returning.py

result = db.session.execute(
        db
        .update(Contact, values={'value': payload['value']}, returning=Contact.__table__.columns)
        .where(Contact.id == payload['id'])
    )
    db.session.commit()
    fetched_data = result.first()
    contact = {}
    for (index, column) in enumerate(result.keys()):
        contact[column] = fetched_data[index]

    return Contact(**contact)