我如何循环浏览此页面上的下拉菜单来浏览每个产品的规格和价格？

Question

嗨，我对Python和Web抓取比较陌生。我正在尝试从该页（https://www.jmesales.com/kuriyama-3-4-in-brass-quick-couplings/）下拉菜单中的每个产品选项中提取数据。我相信页面不使用JavaScript，我更愿意使用请求和BeautifulSoup，而不是webdriver。我有代码可以获取每个选项的名称和属性值，但我不确定如何访问与每个选项关联的定价和规格数据。这是我的代码：

from urllib.request import urlopen
from bs4 import BeautifulSoup
import requests

url = 'https://www.jmesales.com/kuriyama-3-4-in-brass-quick-couplings/'

headers = {"User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36"}
res = requests.get(url, headers=headers)

soup = BeautifulSoup(res.text,'lxml')

options = [item['value'] for item in soup.select('#attribute_select_42800 option')]

for option in options:
    print(option)

我想访问每个选项的价格和相关数据。任何帮助都将不胜感激

Answer 1

尝试类似的方法：

from bs4 import BeautifulSoup
import requests

url = 'https://www.jmesales.com/kuriyama-3-4-in-brass-quick-couplings/'
s = requests.Session()
headers = {"User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36"}
res = s.get(url, headers=headers)

soup = BeautifulSoup(res.text,'lxml')

options = [[item['value'], name.text] for item, name in zip(soup.select('#attribute_select_42800 option'), soup.select('#attribute_select_42800 option'))]



id = soup.select_one('input[name^="product_id"]').get('value')

for option in options[1:]:
    item_num, item_name = option
    data = {'action': 'add', 'attribute[42800]': item_num, 'product_id': id, 'qty[]': '1'}
    product = s.post('https://www.jmesales.com/remote/v1/product-attributes/53564', data=data).json()
    price = product['data']['price']['without_tax']['formatted']

    print(f'Item name: {item_name} Item price: {price}')

印刷品：

Item name: Part A Female NPT x Male Adapter Item price: $6.30
Item name: Part B Female Coupler x Male NPT Item price: $13.80
Item name: Part C Female Coupler x Hose Shank Item price: $11.50
Item name: Part D Female Coupler x Female NPT Item price: $12.80
Item name: Part E Male Adapter x Hose Shank Item price: $8.50
Item name: Part F Male NPT x Male Adapter Item price: $7.30
Item name: Dust Cap Item price: $11.00
Item name: Dust Plug Item price: $8.10

以上代码仅以您拥有的特定url为例，可以解析多个url：

url = 'https://www.jmesales.com/dixon-brass-female-ght-x-female-npt-adapter-lead-free/'
s = requests.Session()
headers = {"User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36"}
res = s.get(url, headers=headers)

soup = BeautifulSoup(res.text,'lxml')

attrid = re.findall('\[([\d]+)\]', soup.select_one('.form-select.form-select small').get('name'))[0]

options = [[item['value'], name.text] for item, name in zip(soup.select(f'#attribute_select_{attrid} option'), soup.select(f'#attribute_select_{attrid} option'))]


id = soup.select_one('input[name^="product_id"]').get('value')

for option in options[1:]:
    item_num, item_name = option
    data = {'action': 'add', f'attribute[{attrid}]': item_num, 'product_id': id, 'qty[]': '1'}
    product = s.post(f'https://www.jmesales.com/remote/v1/product-attributes/{id}', data=data).json()
    price = product['data']['price']['without_tax']['formatted']

    print(f'Item name: {item_name} Item price: {price}')