用硒刮下一页问题 [英] Scraping next pages issue with selenium

问题描述

我正在尝试在 google 上抓取基本信息.我正在使用的代码如下.不幸的是它没有移动到下一页，我不知道原因.我使用 selenium 和 google chrome 作为浏览器(没有 firefox).你能告诉我我的代码有什么问题吗?

I am trying to scrape basic information on google. The code that I am using is the following. Unfortunately it does not move to the next page and I am not figuring the reason why. I am using selenium and google chrome as browser (no firefox). Could you please tell me what is wrong in my code?

driver.get('https://www.google.com/advanced_search?q=google&tbs=cdr:1,cd_min:3/4/2020,cd_max:3/4/2020&hl=en')

search = driver.find_element_by_name('q')
search.send_keys('tea')
search.submit()

soup = BeautifulSoup(driver.page_source,'lxml')
result_div = soup.find_all('div', attrs={'class': 'g'})

titles = []

while True:
    next_page_btn =driver.find_elements_by_xpath("//a[@id='pnnext']")
    for r in result_div:
        if len(next_page_btn) <1:
            print("no more pages left")
            break
        else:
            try:
                title = None
                title = r.find('h3')

                if isinstance(title,Tag):
                    title = title.get_text()
                    print(title)
                if title != '' :
                    titles.append(title)
            except:
                continue

        element =WebDriverWait(driver,5).until(expected_conditions.element_to_be_clickable((By.ID,'pnnext')))
        driver.execute_script("return arguments[0].scrollIntoView();", element)
        element.click()

推荐答案

我将查询字符串中的 q 设置为空字符串.使用 as_q 而不是 q 作为搜索框名称.并稍微重新排序了您的代码.我设置了页面限制以阻止它永远持续下去.

I set q in the query string to be an empty string. Used as_q not q for the search box name. And reordered your code a bit. I put a page limit in to stop it going on forever.

from selenium import webdriver
from bs4 import BeautifulSoup
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions

driver = webdriver.Chrome()
driver.get('https://www.google.com/advanced_search?q=&tbs=cdr:1,cd_min:3/4/2020,cd_max:3/4/2020&hl=en')

search = driver.find_element_by_name('as_q')
search.send_keys('tea')
search.submit()

titles = []
page_limit = 5
page = 0

while True:
    soup = BeautifulSoup(driver.page_source, 'lxml')
    result_div = soup.find_all('div', attrs={'class': 'g'})
    for r in result_div:
        for title in r.find_all('h3'):
            title = title.get_text()
            print(title)
            titles.append(title)
    next_page_btn = driver.find_elements_by_id('pnnext')
    if len(next_page_btn) == 0 or page > page_limit:
        break
    element = WebDriverWait(driver, 5).until(expected_conditions.element_to_be_clickable((By.ID, 'pnnext')))
    driver.execute_script("return arguments[0].scrollIntoView();", element)
    element.click()
    page = page + 1
driver.quit()

这篇关于用硒刮下一页问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！