python selenium設置chrome的下載路徑

python可以通過ChromeOptions設置chrome參數，如下載路徑等，代碼如下(python 3.6.7)：

#-*-coding=utf-8-*-


from selenium import webdriver
import time

def set_chrome_pref():
    chromeOptions = webdriver.ChromeOptions()
    prefs = {"download.default_directory":"D:\\"}
    chromeOptions.add_experimental_option("prefs", prefs)
    driver = webdriver.Chrome(chrome_options=chromeOptions)
    time.sleep(10)