如何通过 Python Selenium 使用多进程池

Question

我有一些代码需要从数百个网页中获取数据，我想通过为其运行多个 Selenium Chrome 浏览器实例来加快速度。例如我这里有这个代码：

from selenium import webdriver
from multiprocessing import Pool
from tkinter import *

#initiate browser
def browser():
    global driver
    driver = webdriver.Chrome(r"C:\Users\areed\Desktop\p\chromedriver.exe")
    return driver

#test link
def test():
    links = [link1.com, link2.com, link3.com, link4.com]
    browser()
    for l in links:
        driver.get(l)
        dostuff(driver)

#Scrape Data
def dostuff(driver):
    print('doing Stuff')

#multiprocess Function      
def multip():
    pool = Pool(processes=4)
    pool.map(test())

#tkinter Window
if __name__ == "__main__":  
    win = Tk()
    win.title("test")
    win.geometry('300x200')
    btn = Button(win, text="Tester", command=multip)
    btn.pack()
    win.mainloop()

我怎样才能让这段代码运行多个 selenium chrome 浏览器？这段代码在不添加多进程的情况下工作得很好。有人可以向我解释一下如何解决这个问题吗？谢谢！

Answer 1

我写了多进程的示例代码。

您可以将链接设置为 test() 函数的参数。

每个浏览器将导航到不同的链接。

from selenium import webdriver
from multiprocessing import Pool

# I remove global driver because you cannot use shared driver in multiprocess.
def browser():  
    driver = webdriver.Chrome()
    return driver
 
def test_func(link):
    driver = browser()  # Each browser use different driver.
    driver.get(link)

def multip():
    links = ["https://stackoverflow.com/", "https://signup.microsoft.com/"]
    pool = Pool(processes=3)
    for i in range(0, len(links)):  
        pool.apply_async(test_func, args={links[i]})

    pool.close()
    pool.join()
    
 if __name__ == '__main__':
     multip()

我已经尝试过上面的代码并且成功了。