selenium实现网页截全屏

from selenium import webdriver
options = webdriver.ChromeOptions()
options.add_argument('--headless')
options.add_argument('--dns-prefetch-disable')
options.add_argument('--no-referrers')
options.add_argument('--disable-gpu')
options.add_argument('--disable-audio')
options.add_argument('--no-sandbox')
options.add_argument('--ignore-certificate-errors')
options.add_argument('--allow-insecure-localhost')
driver = webdriver.Chrome(options=options)
driver.get('http://www.douban.com')
width = driver.execute_script(
        "return Math.max(document.body.scrollWidth, document.body.offsetWidth, document.documentElement.clientWidth, document.documentElement.scrollWidth, document.documentElement.offsetWidth);")
height = driver.execute_script(
        "return Math.max(document.body.scrollHeight, document.body.offsetHeight, document.documentElement.clientHeight, document.documentElement.scrollHeight, document.documentElement.offsetHeight);")
driver.set_window_size(width + 100, height + 100)
driver.save_screenshot('douban.png')
driver.close()