Selenium 中的多线程/多处理

Question

我写了一个 python 脚本，它从一个文本文件中抓取 urls 并从一个元素中打印出 href。然而，我在这里的目标是通过多处理或多线程使它能够更快地在更大范围内完成。

在工作流程中，每个浏览器进程将从当前 url 获取 href，并从同一浏览器实例中的队列加载下一个 link（假设有 5 个）。当然每个 link 应该被抓取 1 次。

示例输入文件：HNlinks.txt

https://news.ycombinator.com/user?id=ingve
https://news.ycombinator.com/user?id=dehrmann
https://news.ycombinator.com/user?id=thanhhaimai
https://news.ycombinator.com/user?id=rbanffy
https://news.ycombinator.com/user?id=raidicy
https://news.ycombinator.com/user?id=svenfaw
https://news.ycombinator.com/user?id=ricardomcgowan

代码：

from selenium import webdriver

driver = webdriver.Chrome()
input1 = open("HNlinks.txt", "r")
urls1 = input1.readlines()

for url in urls1:
    driver.get(url)

    links=driver.find_elements_by_class_name('athing')
    for link in links:
        print(link.find_element_by_css_selector('a').get_attribute("href"))

Answer 1

使用多处理*

注意：我没有在本地测试-运行这个答案。请尝试并提供反馈：

from multiprocessing import Pool
from selenium import webdriver

input1 = open("HNlinks.txt", "r")
urls1 = input1.readlines()

def load_url(url):
    driver = webdriver.Chrome()
    driver.get(url)
    links=driver.find_elements_by_class_name('athing')
    for link in links:
        print(link.find_element_by_css_selector('a').get_attribute("href"))

if __name__ == "__main__":
    # how many concurrent processes do you want to span? this is also limited by 
    the number of cores that your computer has.
    processes = len(urls1)
    p = Pool(processes ) 
    p.map(load_url, urls1)
    p.close()
    p.join()

Selenium 中的多线程/多处理

Multithreading / Multiprocessing in Selenium

python

selenium

multithreading

multiprocessing

python-multithreading

使用多处理*