Python_爬虫_基础

1.urllib 和  Xpath的区别与联系

from urllib import request
from lxml import etree
from bs4 import BeautifulSoup

url = "https://www.zhipin.com/job_detail/1418671405.html?ka=search_list_1"
req = request.urlopen(url).read().decode("utf8")

sel=etree.HTML(req) #实例化
job_desc = sel.xpath(r'//*[@id="main"]/div[3]/div/div[2]/div[3]/div[1]/div/text()')[0]
company_desc = sel.xpath(r'//*[@id="main"]/div[3]/div/div[2]/div[3]/div[2]/div/text()')[0]
print(job_desc)
print(company_desc)

# -------------------------------------------------------------------------------------------------

from urllib import request
from bs4 import BeautifulSoup

url = "https://www.zhipin.com/job_detail/1418671405.html?ka=search_list_1"
req = request.urlopen(url).read().decode("utf8")
soup = BeautifulSoup(req,'html.parser')
job_desc = soup.find().find_all()    #直接写筛选条件，不能用xpath等 
print(job_desc)