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

參考：https://stackoverflow.com/questions/40208051/selenium-using-python-geckodriver-executable-needs-to-be-in-path

解決步驟：

1.參考以上的解決方法，依據https://github.com/mozilla/geckodriver/releases首先更新我的firefox瀏覽器版本，本來是53更新到55

2.下載geckodriver

3.設定執行路徑：

from selenium import webdriver
driver = webdriver.Firefox(executable_path=r'your\path\geckodriver.exe')
driver.get('http://yoursite.com')

完美解決！Cheers

另附上IE，和Chrome的啟動方式：

def get_chromebrowser():
    chrome_browser = webdriver.Chrome(r'yourpath\chromedriver.exe')
    return chrome_browser

def 
 
get_iebrowser():
    ie_browser = webdriver.Ie(r'C:\Program Files\Internet Explorer\IEDriverServer.exe')#這個貌似要預設的
    return ie_browser