Memory

def run_import():
    with open('listings.csv', 'r') as csv_file:
        reader = csv.reader(csv_file, delimiter=";")
        inserts = []
        for row in reader:
            inserts.append({'item_id': int(row[0]),
                            'order_type': ItemOrderType.from_string(row[1].replace('<','').replace('>','')),
                            'listings': int(row[2]),
                            'unit_price': int(row[3]),
                            'quantity': int(row[4])})

            if len(inserts) == 10000:
                db.engine.execute(ItemOrder.__table__.insert(), inserts)
                inserts = []
        db.engine.execute(ItemOrder.__table__.insert(), inserts)