pipelines.py 文件源码

def from_settings(cls, settings):
        dbparams = dict(
            host=settings['MYSQL_HOST'],
            port=settings['MYSQL_PORT'],
            db=settings['MYSQL_DBNAME'],
            user=settings['MYSQL_USER'],
            passwd=settings['MYSQL_PASSWD'],
            charset=settings['MYSQL_CHARSET'],
            cursorclass=MySQLdb.cursors.DictCursor,
            use_unicode=False,
        )
        dbpool = adbapi.ConnectionPool('MySQLdb', **dbparams)  # **?????????????
        return cls(dbpool)

    # pipeline????