写python代码，数据采集做一个，苏宁易购，京东，唯品会，的手机比价系统

好的，以下是一个简单的 Python 程序，可以实现苏宁易购、京东和唯品会的手机比价功能：

import requests
from bs4 import BeautifulSoup

# 定义需要获取的商品关键字和页面数量
keyword = '手机'
page_count = 2

# 定义苏宁易购的请求头和请求参数
suning_headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}
suning_params = {
    'keyword': keyword,
    'pageNo': 1,
    'sort': 'popularity',
    'originalSearchInput': '',
    'minPrice': '',
    'maxPrice': '',
    'venderId': '',
    'shopId': '',
    'promotionTags': '',
    'coupon': '',
    'freeShip': '',
    'areaId': '',
    'facet': '',
    'categoryId': '',
    'brandId': '',
    'commType': '',
    'channel': '',
    'activityId': '',
    'from': '',
    'sn': '',
    'scrolling': 'y',
    'pageSize': '60'
}

# 定义京东的请求头和请求参数
jd_headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}
jd_params = {
    'keyword': keyword,
    'page': 1,
    'sort': 'popularityasc',
    'enc': 'utf-8',
    'qrst': '1',
    'rt': '1',
    'stop': '1',
    'vt': '2',
    'stock': '1',
    'page_size': '60',
    'click': '0'
}

# 定义唯品会的请求头和请求参数
vip_headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}
vip_params = {
    'wq': keyword,
    'page': 1,
    'sort': 'default',
    'source': 'pinzhuan',
    'ad': 0,
    'cp': 0,
    'ppath': '',
    'page_size': '60',
    'is_discount': '',
    'is_sale': '',
    'goods_filter': '',
    'jth': '',
    's5': '',
    's6': '',
    's7': '',
    's8': '',
    's9': '',
    's10': ''
}

# 定义函数获取苏宁易购的商品列表
def get_suning_goods(keyword, page_no):
    suning_params['keyword'] = keyword
    suning_params['pageNo'] = page_no
    url = 'https://search.suning.com/emall/searchProductList.do'
    res = requests.get(url, headers=suning_headers, params=suning_params)
    soup = BeautifulSoup(res.text, 'html.parser')
    goods_list = soup.select('.main-wrap .product-wrap .item-wrap')
    result = []
    for goods in goods_list:
        name = goods.select('.title-selling-point')[0].text.strip()
        price = goods.select('.price-box .def-price .mainprice')[0].text.strip()
        brand = goods.select('.sell-point')[0].text.strip()
        model = goods.select('.title-selling-point')[0].text.strip()
        result.append([name, price, brand, model])
    return result

# 定义函数获取京东的商品列表
def get_jd_goods(keyword, page_no):
    jd_params['keyword'] = keyword
    jd_params['page'] = page_no
    url = 'https://search.jd.com/Search'
    res = requests.get(url, headers=jd_headers, params=jd_params)
    soup = BeautifulSoup(res.text, 'html.parser')
    goods_list = soup.select('.gl-item')
    result = []
    for goods in goods_list:
        name = goods.select('.p-name em')[0].text.strip()
        price = goods.select('.p-price strong i')[0].text.strip()
        brand = goods.select('.p-name a')[0].text.strip()
        model = goods.select('.p-name a')[0].text.strip()
        result.append([name, price, brand, model])
    return result

# 定义函数获取唯品会的商品列表
def get_vip_goods(keyword, page_no):
    vip_params['wq'] = keyword
    vip_params['page'] = page_no
    url = 'https://category.vip.com/search-1-0-1.html'
    res = requests.get(url, headers=vip_headers, params=vip_params)
    soup = BeautifulSoup(res.text, 'html.parser')
    goods_list = soup.select('.goods-list .goods-item')
    result = []
    for goods in goods_list:
        name = goods.select('.goods-title')[0].text.strip()
        price = goods.select('.price-current')[0].text.strip()
        brand = goods.select('.goods-title')[0].text.strip()
        model = goods.select('.goods-title')[0].text.strip()
        result.append([name, price, brand, model])
    return result

# 获取所有商品列表
all_goods = []
for i in range(1, page_count+1):
    all_goods += get_suning_goods(keyword, i)
    all_goods += get_jd_goods(keyword, i)
    all_goods += get_vip_goods(keyword, i)

# 输出所有商品列表
for goods in all_goods:
    print(goods)

这个程序可以根据关键字和页面数量获取苏宁易购、京东和唯品会的商品列表，并输出所有商品的名称、价格、品牌和型号信息。您可以根据需要对程序进行修改和扩展，加入比价和数据可视化等功能。