我的类实例在遍历for循环时消失。

Question

所以我试图同时打开一系列的网页浏览器。在调用单个类实例(如果是object实例时纠正我)，这样做没有问题。我试图使我的代码更漂亮，并通过for循环将args提供给实例。浏览器打开得很好，但随后它们都消失了。有人告诉我，这与垃圾收集有关，但我不知道如何绕过它。请帮帮忙。

from selenium import webdriver
from threading import Thread


class Dashboard(Thread):

    def __init__(self, position, url):
        super().__init__()       
        self.position = position
        self.url = url

    def run(self):

        chrome_options = webdriver.ChromeOptions()
        chrome_options.add_argument('--window-size=256,160')
        #chrome_options.add_argument('--start-maximized')
        chrome_options.add_argument(self.position)
        self.driver = webdriver.Chrome(options=chrome_options)
        self.driver.get(self.url)


pos = ['--window-position=100,100', '--window-position=1000,1000']
web = ['https://www.youtube.com', 'https://www.facebook.com']


for a, b in zip(pos, web):

    screen = Dashboard(a, b).start()

Answer 1

驱动程序超出范围，导致浏览器关闭。将驱动程序添加到某个全局变量中。

from selenium import webdriver
from threading import Thread

all_drivers = []


class Dashboard(Thread):

    def __init__(self, position, url):
        super().__init__()
        self.position = position
        self.url = url
        self.driver = None

    def run(self):
        chrome_options = webdriver.ChromeOptions()
        chrome_options.add_argument('--window-size=256,160')
        # chrome_options.add_argument('--start-maximized')
        chrome_options.add_argument(self.position)
        self.driver = webdriver.Chrome(options=chrome_options)
        self.driver.get(self.url)
        all_drivers.append(self.driver)


pos = ['--window-position=100,100', '--window-position=1000,1000']
web = ['https://www.youtube.com', 'https://www.facebook.com']

for a, b in zip(pos, web):
    screen = Dashboard(a, b).start()

# close the drivers once your purpose is solved
for driver in all_drivers:
    driver.quit()