从 gif 直观地感受一下效果

我有大量 url 需要访问，但是有些 url 会超时

为了避免超时，设置driver.set_page_load_timeout(3)限时3秒，一旦超时就会产生 TimeoutException

而且超时后标签页就卡柱了，只能通过 driver.close()关闭

如果你只有一个标签页，关闭就直接退出了，还得重启

自然想到先保留一个备用的标签，原标签超时需要关闭的时候就切换过来，然后再关闭，并打开新标签，保证任何时候都有两个标签页可用！！

def visit(urls, timeout=3): driver.implicitly_wait(timeout) # 操作、获取元素时的隐式等待时间 driver.set_page_load_timeout(timeout) # 页面加载超时等待时间 main_win = driver.current_window_handle for url in urls: all_win = driver.window_handles try: if len(all_win) == 1: driver.execute_script('window.open();') driver.get(url) # 页面处理 pass except Exception: for win in all_win: if main_win != win: driver.close() # 关闭卡住的标签 driver.switch_to.window(win) # 切换到备用标签 main_win = win # 切换到备用标签 break

完整代码

from selenium import webdriverfrom selenium.webdriver.common.by import Byfrom selenium.webdriver.common.keys import Keysfrom selenium.webdriver.support import expected_conditions as ECfrom selenium.webdriver.support.wait import WebDriverWaitfrom selenium.webdriver.chrome.options import Optionsimport timeimport requestsimport zipfileimport osdef un_zip(file_name, to_dir='./'): """unzip zip file""" zip_file = zipfile.ZipFile(file_name) if os.path.isdir(to_dir): pass else: os.mkdir(to_dir) for names in zip_file.namelist(): zip_file.extract(names, to_dir) zip_file.close() def download_driver(to_dir='./', version=''): print('install chrome-driver first') url = 'http://npm.taobao.org/mirrors/chromedriver/LATEST_RELEASE' if len(version)>0: url = 'http://npm.taobao.org/mirrors/chromedriver/LATEST_RELEASE_'+version version = requests.get(url).content.decode('utf8') driver_file = 'http://npm.taobao.org/mirrors/chromedriver/' + version + '/chromedriver_win32.zip' r = requests.get(driver_file) download_zip = "chromedriver_win32.zip" with open(download_zip, "wb") as code: code.write(r.content) un_zip(download_zip, to_dir) os.remove(download_zip)try: driver = webdriver.Chrome()except Exception as e: download_driver(to_dir='./', version='76') driver = webdriver.Chrome()with open("url.txt", 'r') as file: urls = [ line.strip('\n') for line in file.readlines()]visit(urls)for i in driver.window_handles: driver.switch_to.window(i) driver.close()

总结

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