selenium设置:浏览器不显示图片

from selenium import webdriver
# # options=webdriver.FirefoxProfile()
# options = webdriver.ChromeOptions()
# options.set_preference('permissions.default.image',2)
# # b=webdriver.Firefox(options)
# b =webdriver.Chrome(options)
# b.get('http://image.baidu.com/')


from selenium import webdriver
from selenium.webdriver.chrome.options import Options
import time
import random

options = Options()
num = str(float(random.randint(500, 600)))
options.add_argument("user-agent=Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/{}"
                     " (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/{}".format(num, num))
# 禁止图片和css加载
prefs = {"profile.managed_default_content_settings.images": 2, 'permissions.default.stylesheet': 2}
options.add_experimental_option("prefs", prefs)
#executable_path='D:\\chromedriver\\chromedriver.exe',
driver = webdriver.Chrome( chrome_options=options)
driver.get('https://www.ly.com/')
time.sleep(5)
html = driver.find_element_by_xpath("//body").get_attribute("innerHTML")
print(html)