scrapy数据导入mysql问题?报错

ｐｉｐｅｌｉｎｅ文件：


import MySQLdb

class Task1Pipeline(object):

    def process_item(self, item, spider):

        task1_db = spider.settings.get('task1_db')
        con = MySQLdb.connect(**task1_db)
        cur = con.cursor()
        sql = ("insert into person_in (client_name,quaification,get_method,certificate_n,office,class_hour,penalty_in)"
        "values(%s,%s,%s,%s,%s,%s,%s)")
        lis = (item['client_name'],item['quaification'],item['get_method'],item['certificate_n'],
               item['office'],item['class_hour'],item['penalty_in'])
        cur.execute(sql,lis)
        con.commit()
        cur.close()
        con.close()
        return item

settings.py中文件

BOT_NAME = 'task1'

SPIDER_MODULES = ['task1.spiders']
NEWSPIDER_MODULE = 'task1.spiders'

task1_db = {'db':'task1_db','user':'root','passwd':'fy',
            'host':'localhost','use_unicode':True,'charset':'utf8'}
ITEM_PIPELINES = {
    'task1.pipelines.Task1Pipeline':300,
}

报错：

TypeError: Connect() argument after ** must be a mapping, not NoneType

我就不懂了，按照别人源文件修改的，mysql已经建立task1_db这个数据库，为什么会报错怎么改？？