python 爬虫爬取京东ps4售卖情况

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @File : HtmlParser.py
# @Author: 赵路仓
# @Date : 2020/3/17
# @Desc :
# @Contact : 398333404@qq.com
import json

from lxml import etree
import requests
from bs4 import BeautifulSoup


url="https://search.jd.com/Search?keyword=ps4&enc=utf-8&wq=ps4&pvid=cf0158c8664442799c1146a461478c9c"
head={
 'authority': 'search.jd.com',
 'method': 'GET',
 'path': '/s_new.php?keyword=%E6%89%8B%E6%9C%BA&enc=utf-8&qrst=1&rt=1&stop=1&vt=2&wq=%E6%89%8B%E6%9C%BA&cid2=653&cid3=655&page=4&s=84&scrolling=y&log_id=1529828108.22071&tpl=3_M&show_items=7651927,7367120,7056868,7419252,6001239,5934182,4554969,3893501,7421462,6577495,26480543553,7345757,4483120,6176077,6932795,7336429,5963066,5283387,25722468892,7425622,4768461',
 'scheme': 'https',
 'referer': 'https://search.jd.com/Search?keyword=%E6%89%8B%E6%9C%BA&enc=utf-8&qrst=1&rt=1&stop=1&vt=2&wq=%E6%89%8B%E6%9C%BA&cid2=653&cid3=655&page=3&s=58&click=0',
 'user-agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.139 Safari/537.36',
 'x-requested-with': 'XMLHttpRequest',
}

def page(page):
 print("开始")
 url = "https://search.jd.com/Search?keyword=ps4&enc=utf-8&qrst=1&rt=1&stop=1&vt=1&wq=ps4&page="+page+"&s=181&click=0"
 r=requests.get(url,timeout=3,headers=head)
 r.encoding=r.apparent_encoding
 # print(r.text)
 b=BeautifulSoup(r.text,"html.parser")
 #print(b.prettify())
 _element = etree.HTML(r.text)
 datas = _element.xpath('//li[contains(@class,"gl-item")]')
 print(datas)
 for data in datas:
  p_price = data.xpath('div/div[@class="p-price"]/strong/i/text()')
  p_comment = data.xpath('div/div[5]/strong/a/text()')
  p_name = data.xpath('div/div[@class="p-name p-name-type-2"]/a/em/text()')
  p_href = data.xpath('div/div[@class="p-name p-name-type-2"]/a/@href')
  comment=' '.join(p_comment)
  name = ' '.join(p_name)
  price = ' '.join(p_price)
  href = ' '.join(p_href)
  print(name,price,p_comment,href)

if __name__=="__main__":
 page("5")