Mac “'geckodriver' executable needs to be in PATH”

Mac 下使用selenium打开一个空的浏览器窗口：

from selenium import webdriver
driver = webdriver.Firefox()

python报错：

'geckodriver' executable needs to be in PATH

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解决

1.brew安装geckodriver

$ brew install geckodriver

2.安装完成后，再次运行：

from selenium import webdriver
driver = webdriver.Firefox()

打开网页成功，问题解决！

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