[PYTHON] How to pass settings to Item Pipeline in Scrapy

class MySQLStorePipeline(object):

    @classmethod
    def from_settings(cls, settings):
        return cls(settings.get('DB_SETTING'))

    def __init__(self, db_settings):
        db.init_session(db_settings)

    def process_item(self, item, spider):
        shop = Shop(
            brand_id=1,
            name=item['name'],
            address=item['address'])
        db.db_session.add(shop)
        db.db_session.commit()
        return item

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