在python脚本中，使用selenium启动浏览器报错，原因是未安装浏览器驱动，报错内容如下：
# -*- coding:utf-8 -*-
from selenium import webdriver
driver = webdriver.Firefox()
driver.get("http://www.baidu.com")
报错提示如下所示：
Traceback (most recent call last):
File "D:\Program Files\Python36\lib\site-packages\selenium\webdriver\common\service.py", line 76, in start
stdin=PIPE)
File "D:\Program Files\Python36\lib\subprocess.py", line 709, in __init__
restore_signals, start_new_session)
File "D:\Program Files\Python36\lib\subprocess.py", line 997, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] 系统找不到指定的文件。
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "D:/Program Files/Python36/baidu.py", line 4, in <module>
driver = webdriver.Firefox()
File "D:\Program Files\Python36\lib\site-packages\selenium\webdriver\firefox\webdriver.py", line 164, in __init__
self.service.start()
File "D:\Program Files\Python36\lib\site-packages\selenium\webdriver\common\service.py", line 83, in start
os.path.basename(self.path), self.start_error_message)
selenium.common.exceptions.WebDriverException: Message: 'geckodriver' executable needs to be in PATH.
解决方案：安装Chrome浏览器驱动
1.下载 chromedriver_win32.zip，根据浏览器版本下载对应的压缩包；
下载地址：https://sites.google.com/a/chromium.org/chromedriver/downloads
2.解压后将chromedriver.exe文件放到系统环境变量Path路径下，例如：已将D:\Program Files\Python36\ 添加到系统环境变量Path路径下，将chromedriver.exe文件放到D:\Program Files\Python36\ 目录下即可；
3.将Chrome替换掉原脚本中的Firefox，保存文件并运行。
# -*- coding:utf-8 -*-
from selenium import webdriver
driver = webdriver.Chrome()
driver.get("http://www.baidu.com")
driver.find_element_by_id("kw").send_keys("Selenium2")
driver.find_element_by_id("su").click
driver.quit()
原文：https://blog.csdn.net/weixin_44612439/article/details/87983282