进程池如何避免数据库游标关闭？进程池运行时，游标将关闭。那么我无法将数据插入数据库

Question

from bs4 import BeautifulSoup
import requests
import time
import pymysql
from multiprocessing import Pool
import os
t1=time.time()

定义方法

def multiproc(i,s,cursor):
     t3=time.time()
     print('process %s download %s page，time %s'%(os.getpid(),i,t3-t1))
     url='url%s'%i
     wb_data=s.get(url)
     soup=BeautifulSoup(wb_data.text,'lxml')
     #print(soup)
     titles=soup.select('#content > div.site-section > div.site-house-list.clearfix > dl > dd.fl > p:nth-of-type(1) > a')
     areas=soup.select('#content > div.site-section > div.site-house-list.clearfix > dl > dd.h-metre.f14.bold.pa')
     prices=soup.select('#content > div.site-section > div.site-house-list.clearfix > dl > dd.h-price.pa.f18.yahei.c_red')
     for title,area,price in zip(titles,areas,prices):
         title=title.get_text()
         ti2=title[:10]
         area=area.get_text()
         a2=area[:-2]
         price=price.get_text()
         try:
            cursor.execute('insert into user values ("%s","%s","%s")'%(ti2,a2,price))
         except Exception as err:
            print(err)
     conn.commit()

if __name__=='__main__':

创建进程池

     p=Pool(4)
     conn = pymysql.connect(host='localhost', port=3306, user='root', passwd='123456', db='sqlxianning')
     cursor = conn.cursor()
     s = requests.Session()
     for i in range(1,10):
         p.apply_async(multiproc,args=(i,s,cursor))
     cursor.close()
     conn.close()
     p.close()
     p.join()
     t2=time.time()
     print("total time %s"%(t2-t1))

进程池如何避免数据库游标关闭？当进程池运行时，游标将关闭。那么我无法将数据插入数据库。