之前在mac的Python shell中，無法通過driver=webdriver.Chrome()啟動谷歌瀏覽器。現解決方法如下：

（前提：Chromedriver在/usr/local/bin/目錄下）

from selenium import webdriver
browser = webdriver.Chrome(executable_path="/usr/local/bin/chromedriver")

或：

from selenium import webdriver
path = "/usr/local/bin/chromedriver"
driver = webdriver.Chrome(path)

或：

from selenium import webdriver
driver = webdriver.Chrome("/usr/local/bin/chromedriver")

Mac下用selenium啟動Chrome瀏覽器問題解決