selenium.common.exceptions.WebDriverException: Message: ‘geckodriver’ executable needs to be in PATH

在selenium3中，运行时，报了这个错：“selenium.common.exceptions.WebDriverException: Message: ‘geckodriver’ executable needs to be in PATH.”意思时找不到’geckodriver’ 的环境path 那么如果你没有安装geckodriver驱动的化，需要去配置自己配置geckodriver，

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