求助大佬，这段爬虫代码有一部分看不懂
这段代码注释的地方和while循环看不太懂！求大佬解释一下#这是一个通过关键字来爬取漏洞信息的模块
from lxml import etree
import requests
import re
import warnings
warnings.filterwarnings("ignore") #处理错误
headerss = {
'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36 QIHU 360SE'
}
def KeyWord():
content = input('请输入查询的关键字信息:')
#调用绿盟科技的漏洞库
print('以下是调用的绿盟数据库：')
url = 'http://www.nsfocus.net'
url1 = f'http://www.nsfocus.net/index.php?act=sec_bug&type_id=&os=&keyword={content}&page=1'
url1_re = requests.get(url=url1,headers=headerss)
url1_re.encoding = ('utf-8')
obj = re.compile(r'.*?共(?P<shuliang>.*?)条记录',re.S)#这三行看不懂！
url1_re_quantity = obj.findall(url1_re.text) #！！
url1_re.close #！！
yeshu = url1_re_quantity
yeshu = int(yeshu)
yeshu = yeshu/15
if yeshu % 15 != 0 :
yeshu =yeshu +1
i = 1
while i <= yeshu :
url11 = f'http://www.nsfocus.net/index.php?act=sec_bug&type_id=&os=&keyword={content}&page={i}'
url11_re = requests.get(url=url11,headers=headerss)
url11_re.encoding = ('utf-8')
url11_re_etree = etree.HTML(url11_re.text)
url11_re_etree_title = url11_re_etree.xpath('/html/body/div/section/div/section/div/div/div/div/ul/li[*]/a/text()')
url11_re_etree_link = url11_re_etree.xpath('/html/body/div/section/div/section/div/div/div/div/ul/li[*]/a/@href')
j = 0
while j < len(url11_re_etree_title) :
print(url11_re_etree_title)
print(url + url11_re_etree_link)
j = j+1
i = i+1
KeyWord()
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