python 爬取指定url的ICP备案信息（结构化抓取）

[python]
#coding=gbk
import os
import sys
import re
import time
import urllib2

def perror_and_exit(message, status = -1):
    sys.stderr.write(message + '\n')
    sys.exit(status)

def get_text_from_html_tag(html):
    pattern_text = re.compile(r">.*?    return pattern_text.findall(html)[0][1:-2].strip()

def parse_alexa(url):
    url_alexa = "http://icp.alexa.cn/index.php?q=%s" % url
    print url_alexa
    #handle exception
    times = 0
    while times < 5000: #等待有一定次数限制
        try:
            alexa = urllib2.urlopen(url_alexa).read()

            pattern_table = re.compile(r".*?", re.DOTALL | re.MULTILINE)
            match_table = pattern_table.search(alexa)
            if not match_table:
                raise BaseException("No table in HTML")
            break
        except:
            print "try %s times:sleep %s seconds" % (times, 2**times)
            times += 1
            time.sleep(2**times)
            continue

    table = match_table.group()
    pattern_tr = re.compile(r".*?", re.DOTALL | re.MULTILINE)
    match_tr = pattern_tr.findall(table)
    if len(match_tr) != 2:
        perror_and_exit("table format is incorrect")

    icp_tr = match_tr[1]
    pattern_td = re.compile(r".*?", re.DOTALL | re.MULTILINE)
    match_td = pattern_td.findall(icp_tr)

    #print match_td
    company_name = get_text_from_html_tag(match_td[1])
    company_properties = get_text_from_html_tag(match_td[2])
    company_icp = get_text_from_html_tag(match_td[3])
    company_icp = company_icp[company_icp.find(">") + 1:]
    company_website_name = get_text_from_html_tag(match_td[4])
    company_website_home_page = get_text_from_html_tag(match_td[5])
    company_website_home_page = company_website_home_page[company_website_home_page.rfind(">") + 1:]
    company_detail_url = get_text_from_html_tag(match_td[7])
    pattern_href = re.compile(r"href=\".*?\"", re.DOTALL | re.MULTILINE)
    match_href = pattern_href.findall(company_detail_url)
    if len(match_href) == 0:
        company_detail_url = ""
    else:
        company_detail_url = match_href[0][len("href=\""):-1]
    return [url, company_name, company_properties, company_icp, company_website_name, company_website_home_page, company_detail_url]
    pass

if __name__ == "__main__":
    fw = file("out.txt", "w")
    for url in sys.stdin:
        fw.write("\t".join(parse_alexa(url)) + "\n")

#coding=gbk
import os
import sys
import re
import time
import urllib2

def perror_and_exit(message, status = -1):
sys.stderr.write(message + '\n')
sys.exit(status)

def get_text_from_html_tag(html):
pattern_text = re.compile(r">.*? return pattern_text.findall(html)[0][1:-2].strip()

def parse_alexa(url):
    url_alexa = "http://icp.alexa.cn/index.php?q=%s" % url
    print url_alexa
    #handle exception
    times = 0
    while times < 5000: #等待有一定次数限制
        try:
            alexa = urllib2.urlopen(url_alexa).read()

            pattern_table = re.compile(r".*?", re.DOTALL | re.MULTILINE)
            match_table = pattern_table.search(alexa)
            if not match_table:
                raise BaseException("No table in HTML")
            break
        except:
            print "try %s times:sleep %s seconds" % (times, 2**times)
            times += 1
            time.sleep(2**times)
            continue

    table = match_table.group()
    pattern_tr = re.compile(r".*?", re.DOTALL | re.MULTILINE)
    match_tr = pattern_tr.findall(table)
    if len(match_tr) != 2:
        perror_and_exit("table format is incorrect")

    icp_tr = match_tr[1]
    pattern_td = re.compile(r".*?", re.DOTALL | re.MULTILINE)
    match_td = pattern_td.findall(icp_tr)

    #print match_td
    company_name = get_text_from_html_tag(match_td[1])
    company_properties = get_text_from_html_tag(match_td[2])
    company_icp = get_text_from_html_tag(match_td[3])
    company_icp = company_icp[company_icp.find(">") + 1:]
    company_website_name = get_text_from_html_tag(match_td[4])
    company_website_home_page = ge

补充：Web开发 , Python ,