July 2017
Intermediate to advanced
398 pages
11h 54m
Chinese
Content preview from Python数据处理
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252
｜
第
12
章
12.1.1
使用
Selenium
进行屏幕读取
Selenium
是一个强大的基于
Java
的引擎，可通过支持
Selenium
的浏览器直接与网站交互。
它是一个非常流行的用于用户测试的框架，让公司可以为它们的网站构建测试。对于我们
的目标，我们会使用
Selenium
来抓取一个我们需要交互或不是所有内容都在第一次请求中
加载（例如图
11-6
中的示例，大多数的内容在第一次请求完成后加载）的站点。让我们查
看页面，看看是否可以通过
Selenium
读取它。
首先，需要使用
pip install
安装
Selenium
（
http://selenium-python.readthedocs.io/en/latest/
installation.html
）：
pip install selenium
现在，开始编写
Selenium
代码。首先，需要打开浏览器。
Selenium
支持许多不同的浏览
器，但是附带了一个
Firefox
的内置驱动。如果你没有安装
Firefox
，可以安装它，或者
为
Chrome
（
https://code.google.com/p/selenium/wiki/ChromeDriver
）、
IE
（
https://code.google.
com/p/selenium/wiki/InternetExplorerDriver
）或
Safari
（
https://code.google.com/p/selenium/wiki/Safari
Driver
）安装
Selenium
驱动。让我们看一下是否能够使用 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.