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python - 我的类实例在遍历 for 循环时消失

问题描述

所以我试图同时打开一系列网络浏览器。当我调用单个类实例时，这样做没有问题（如果它是对象的实例，请纠正我）。我正在尝试使我的代码更漂亮，并通过 for 循环将 args 提供给实例。浏览器可以正常打开，但随后它们都消失了。有人告诉我这与垃圾收集有关，但不知道如何解决它。请帮忙。

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()

标签： pythonclassfor-loopgarbage-collectionselenium-chromedriver

解决方案

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。

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()

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