selenium模块下载
在Python中，我们通过pip来下载使用：
pip install selenium
pip install -i https://pypi.doubanio.com/simple/ selenium # 备用地址浏览器驱动下载
除此之外，我们还需要安装浏览器驱动，比较常见的浏览器我们一般选用Chrome和Firefox了，当然IE和Safari也有自己的驱动：
- Chrome驱动地址：https://npm.taobao.org/mirrors/chromedriver，或者参见http://chromedriver.storage.googleapis.com/index.html
- firefox驱动地址：https://github.com/mozilla/geckodriver/releases
- IE驱动地址：https://developer.microsoft.com/en-us/microsoft-edge/tools/webdriver/
- Safari驱动地址：https://webkit.org/blog/6900/webdriver-support-in-safari-10/
根据系统平台下载对应的浏览器驱动，windows下32位即可：
我们下载浏览器驱动的时候，要注意驱动和浏览器的版本对照，一般在每个版本详情目录中的notes.txt文件里，存着对应版本关系：
或者参考下面的对应表：
| Chromedriver | Chrome | Chromedriver | Chrome |
|---|---|---|---|
| ChromeDriver v2.46 (2019-02-01) | Supports Chrome v71-73 | ChromeDriver v2.45 (2018-12-10) | Supports Chrome v70-72 |
| ChromeDriver v2.44 (2018-11-19) | Supports Chrome v69-71 | ChromeDriver v2.43 (2018-10-16) | Supports Chrome v69-71 |
| ChromeDriver v2.42 (2018-09-13) | Supports Chrome v68-70 | ChromeDriver v2.41 (2018-07-27) | Supports Chrome v67-69 |
| ChromeDriver v2.40 (2018-06-07) | Supports Chrome v66-68 | ChromeDriver v2.39 (2018-05-30) | Supports Chrome v66-68 |
| ChromeDriver v2.38 (2018-04-17) | Supports Chrome v65-67 | ChromeDriver v2.37 (2018-03-16) | Supports Chrome v64-66 |
| ChromeDriver v2.36 (2018-03-02) | Supports Chrome v63-65 | ChromeDriver v2.35 (2018-01-10) | Supports Chrome v62-64 |
| ChromeDriver v2.34 (2017-12-10) | Supports Chrome v61-63 | ChromeDriver v2.33 (2017-10-03) | Supports Chrome v60-62 |
| ChromeDriver v2.32 (2017-08-30) | Supports Chrome v59-61 | ChromeDriver v2.31 (2017-07-22) | Supports Chrome v58-60 |
| ChromeDriver v2.30 (2017-06-07) | Supports Chrome v58-60 | ChromeDriver v2.29 (2017-04-04) | Supports Chrome v56-58 |
| ChromeDriver v2.28 (2017-03-08) | Supports Chrome v55-57 | ChromeDriver v2.27 (2016-12-21) | Supports Chrome v54-56 |
| ChromeDriver v2.26 (2016-12-05) | Supports Chrome v53-55 | ChromeDriver v2.25 (2016-10-22) | Supports Chrome v53-55 |
| ChromeDriver v2.24 (2016-09-09) | Supports Chrome v52-54 | ChromeDriver v2.23 (2016-08-04) | Supports Chrome v51-53 |
| ChromeDriver v2.22 (2016-06-04) | Supports Chrome v49-52 | ChromeDriver v2.21 (2016-01-26) | Supports Chrome v46-50 |
| ChromeDriver v2.20 (2015-10-08) | Supports Chrome v43-48 | ChromeDriver v2.19 (2015-08-28) | Supports Chrome v43-47 |
| ChromeDriver v2.18 (2015-08-19) | Supports Chrome v43-46 | ChromeDriver v2.17 (2015-07-30) | Supports Chrome v42-43 |
| ChromeDriver v2.16 (2015-06-08) | Supports Chrome v42-45 | ChromeDriver v2.15 (2015-03-26) | Supports Chrome v40-43 |
| ChromeDriver v2.14 (2015-01-28) | Supports Chrome v39-42 | ChromeDriver v2.13 (2014-12-10) | Supports Chrome v38-41 |
| ChromeDriver v2.12 (2014-10-27) | Supports Chrome v36-40 | ChromeDriver v2.11 (2014-10-08) | Supports Chrome v36-40 |
| ChromeDriver v2.10 (2014-05-01) | Supports Chrome v33-36 | ChromeDriver v2.9 (2014-02-03) | Supports Chrome v31-34 |
| ChromeDriver v2.8 (2013-12-16) | Supports Chrome v30-33 | ChromeDriver v2.7 (2013-11-22) | Supports Chrome v30-33 |
| ChromeDriver v2.6 (2013-11-05) | Supports Chrome v29-32 | ChromeDriver v2.5 (2013-11-01) | Supports Chrome v29-32 |
下载到本地之后，把chromedriver.exe移动至Python解释器同级的目录或者Scripts目录下即可。
测试
现在让我们新建一个test1.py文件，输入如下代码，并运行测试：
from selenium import webdriver
# 创建Chrome WebDriver实例，此路径为驱动程序的路径
driver = webdriver.Chrome()
# firefox浏览器打开
# driver = webdriver.Firefox()
# 加载URL网页
driver.get("http://www.baidu.com/")
# 打印当前页面的title属性内容
print(driver.title)
# 关闭浏览器
driver.quit()可以看到打开一个浏览器，然后很快就关闭了，本地也打印出了结果，表示安装成功！