由于近期有一个每日记录京东史密斯旗舰店里所有商品信息的需求，就琢磨着写了一段脚本实现了半自动获取相关信息。
为什么是半自动呢，因为史密斯的商品总共有6页，我将它们的URL直接复制粘贴进了脚本里，没有想办法去自动获取其URL。
不过就如邓小平爷爷所说：“不管黑猫白猫，能捉老鼠的就是好猫”，以下是实现此次需求的代码：

#!/usr/bin/python
# -*- coding:utf-8 -*-

from selenium import webdriver
from lxml import etree
import time,re,csv

# 新建存储csv文件
fp = open('/Users/mason_tao/Desktop/sms.csv','a',newline='',encoding='utf_8_sig')
writer = csv.writer(fp)
# 写入列名
writer.writerow(("商品标题","商品链接","促销价","原价"))

# 获取每页url里的商品详情页url
def get_goods_DetailUrl(url):
    # 将Chrome设置为无头模式
    chrome_options = webdriver.ChromeOptions()
    chrome_options.add_argument('--headless')
    browser = webdriver.Chrome(options=chrome_options)

    # browser = webdriver.Chrome()
    browser.get(url)
    # 延时1秒让网页加载完成
    time.sleep(1)
    source = browser.page_source
    html = etree.HTML(source)
    lis = html.xpath("//div[@class='j-module']/ul/li")
    goods_urls = []
    for li in lis:
        goods_url_1 = li.xpath(".//div[@class='jDesc']/a/@href")[0]
        goods_url = 'https:' + goods_url_1
        goods_urls.append(goods_url)
    return goods_urls
    browser.close()

# 在详情页获取商品标题、促销价、原价
def get_goods_Info(goods_urls):
    for goods_url in goods_urls:
        # browser = webdriver.Chrome()

        chrome_options = webdriver.ChromeOptions()
        chrome_options.add_argument('--headless')
        browser = webdriver.Chrome(options=chrome_options)
        print(goods_url)
        # browser = webdriver.Chrome()
        browser.get(goods_url)
        # browser.execute_script('window.scrollTo(0,document.body.scrollHeight)')
        time.sleep(1)
        goods_source = browser.page_source
        goods_html = etree.HTML(goods_source)
        title = goods_html.xpath("//div[@class='sku-name']/text()")[-1].strip()
        Goods_url = goods_url
        if goods_html.xpath("//span[@class='p-price']/span[2]/text()") == []:
            price = []
        else:
            price = goods_html.xpath("//span[@class='p-price']/span[2]/text()")[0]
        if goods_html.xpath("//div[@class='item hide']/text()") ==[]:
            hide_text = ''
        else:
            hide_text = goods_html.xpath("//div[@class='item hide']/text()")[0]
        pattern = re.compile(".*?到手.*?([0-9]{4})元.*?")
        if re.findall(pattern, hide_text) == []:
            text_price = price
        else:
            text_price = re.findall(pattern, hide_text)[0]
        goods_list = [title,Goods_url,text_price,price]
        writer.writerow(goods_list)
        browser.close()
        time.sleep(1)

def main():
    urls = ['https://mall.jd.com/view_search-396630-0-99-1-24-1.html',
            'https://aosmith1.jd.com/view_search-396630-0-5-1-24-2.html']
    for url in urls:
        detail_urls = (get_goods_DetailUrl(url))
        get_goods_Info(detail_urls)
      

if __name__ =='__main__':
    main()

下图为爬取的部分结果：

史密斯商品