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python - How to scraping data from multiple pages in one web, I'm using Python and BeautifulSoup

问题描述

   # -*- coding: utf-8 -*-
"""
Created on Fri Jun 29 10:38:46 2018

@author: Cinthia
"""

from bs4 import BeautifulSoup as soup
from urllib.request import urlopen as uReq
array = ['146-face', '153-palettes-sets', 'https://www.sociolla.com/147-eyes', 'https://www.sociolla.com/150-lips', 'https://www.sociolla.com/149-brows', 'https://www.sociolla.com/148-lashes']
base_url='https://www.sociolla.com/142-face'
uClient = uReq(base_url)
page_html = uClient.read()
uClient.close()

#html parsing
page_soup = soup(page_html, "html.parser")

#grab the product
kosmetik = page_soup.findAll("div", {"class":"col-md-3 col-sm-6 ipad-grid col-xs-12 productitem"})
print(len(kosmetik))

I want to scrape data from that website, that code above just take how much product on the base url. I don't know how that array will work, so it can take data from the product such as description, image, price from all the pages I make in the array.

I'm new to Python and don't know much about loops yet.

标签： pythonloopsweb-scrapingbeautifulsoupweb-crawler

解决方案

您可以在id=product-list-grid此处找到表格/网格的根元素，并提取包含您需要的所有信息（品牌、链接、类别）和第一个<img>标签的属性。

对于分页，您似乎可以进入下一页添加p=<page number>＆当页面不存在时，它会重定向到第一个页面。这里的一种解决方法是检查响应 url 并检查它是否与您请求的相同。如果相同，您可以增加页码，否则您已经刮掉了所有页面

from bs4 import BeautifulSoup
import urllib.request

count = 1
url = "https://www.sociolla.com/142-nails?p=%d"

def get_url(url):
    req = urllib.request.Request(url)
    return urllib.request.urlopen(req)

expected_url = url % count
response = get_url(expected_url)

results = []

while (response.url == expected_url):
    print("GET {0}".format(expected_url))
    soup = BeautifulSoup(response.read(), "html.parser")

    products = soup.find("div", attrs = {"id" : "product-list-grid"})

    results.append([
        (
            t["data-eec-brand"],    #brand
            t["data-eec-category"], #category
            t["data-eec-href"],     #product link
            t["data-eec-name"],     #product name
            t["data-eec-price"],    #price
            t.find("img")["src"]    #image link
        ) 
        for t in products.find_all("div", attrs = {"class" : "product-item"})
        if t
    ])

    count += 1
    expected_url = url % count
    response = get_url(expected_url)

print(results)

这里存储的结果results是一个元组数组

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