使用selenium、webdriver打开谷歌浏览器，登录页面后闪退，但是版本号是对应的，是因为driver的全局变量问题

1、不设置driver为全局，放在函数内（会闪退）

from selenium import webdriver

# 登陆百度
def main():
    chromedriver_path = r"C:\Program Files (x86)\Google\Chrome\Application\chromedriver.exe"
    driver = webdriver.Chrome(executable_path=chromedriver_path)
    # 打开页面
    page = driver.get('https://www.baidu.com/')

if __name__ == "__main__":
    main()

2、把driver放在函数外，为全局（不会闪退）

from selenium import webdriver

chromedriver_path = r"C:\Program Files (x86)\Google\Chrome\Application\chromedriver.exe"
driver = webdriver.Chrome(executable_path=chromedriver_path)
# 登陆百度
def main():
    # 打开页面
    page = driver.get('https://www.baidu.com/')

if __name__ == "__main__":
    main()

3、也可以把driver放在函数内，只要设置为全局变量就可以

from selenium import webdriver

# 登陆百度
def main():
    global driver
    chromedriver_path = r"C:\Program Files (x86)\Google\Chrome\Application\chromedriver.exe"
    driver = webdriver.Chrome(executable_path=chromedriver_path)
    # 打开页面
    page = driver.get('https://www.baidu.com/')

if __name__ == "__main__":
    main()