python3读取BJDA药品经营企业数据

#-*- coding:utf-8 -*- 
#读取北京FDA的药品经营企业数据
# 20161125 zhangshaohua
import re
import urllib.request
import urllib.parse
import os


def getContent(url,pat,charSet):
    #指定网址、正则表达式、编码方式，返回指定内容
    page = urllib.request.urlopen(url)
    content = page.read().decode(charSet)
    pattern = re.compile(pat)
    result = re.findall(pattern,content)

    return result
#读取首页
url = 'http://www.bjda.gov.cn/eportal/ui?pageId=331148'

#取总记录数,每页20条
zjls = getContent(url,'总记录数:(d{1,5}),','UTF-8')

vdzjls = int(zjls[0])
vdzjls = int(round(vdzjls/20,0)) 



for i in range(51,vdzjls):
    url = 'http://www.bjda.gov.cn/eportal/ui?pageId=331148&currentPage='+str(i)
    pattern = 'artileId=(.*)">查看'
    page_id = getContent(url,pattern,'UTF-8')
    for url_id in page_id:
        try:
            subid = url_id
            suburl = "http://www.bjda.gov.cn/eportal/ui?pageId=331631&artileId="+subid
            qymc = getContent(suburl,'企业名称:</th>
.*?<td>(.*?)</td>','UTF-8')
            zcdz = getContent(suburl,'注册地址:</th>
.*?<td>(.*?)s{0,3}</td>','UTF-8')
            xkzh = getContent(suburl,'许可证号:</th>
.*?<td>(.*?)</td>','UTF-8')

            print(qymc,zcdz,xkzh)
            file_object = open('bjda.txt','a')            
            file_object.write(qymc[0])
            file_object.write(',')
            file_object.write(zcdz[0])
            file_object.write(',')            
            file_object.write(xkzh[0])
            file_object.write('

')
            
        finally:
            None
        file_object.close()

vdzjls  = int(zjls[0])


print('药品零售企业读取完成！')

　　经历了读取HDA的练习，此次读取BJ的数据开始比较顺畅。在读取996条数据时出错，再次出现换行造成的问题；

多次试错后用‘s{0,3}’成功解决.

正则表达式要继续学习，才能不断进步，避免遇“”坑“”时能顺利通过！