折腾：
期间，去试试
参考：
去：
现在最新的Selenium已经到3.7.1了。
Python版本的Selenium的下载：
selenium 3.7.0 : Python Package Index
Selenium Client Driver — Selenium 3.7 documentation
去安装结果出错：
pip install -U selenium
出错：
➜ 自动下单 pip install -U selenium
Collecting selenium
Downloading selenium-3.7.0-py2.py3-none-any.whl (935kB)
40% |█████████████ | 378kB 3.5kB/s eta 0:02:40Exception:
Traceback (most recent call last):
File “/usr/local/lib/python2.7/site-packages/pip/basecommand.py”, line 215, in main
status = self.run(options, args)
File “/usr/local/lib/python2.7/site-packages/pip/commands/install.py”, line 335, in run
wb.build(autobuilding=True)
File “/usr/local/lib/python2.7/site-packages/pip/wheel.py”, line 749, in build
self.requirement_set.prepare_files(self.finder)
File “/usr/local/lib/python2.7/site-packages/pip/req/req_set.py”, line 380, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File “/usr/local/lib/python2.7/site-packages/pip/req/req_set.py”, line 620, in _prepare_file
session=self.session, hashes=hashes)
File “/usr/local/lib/python2.7/site-packages/pip/download.py”, line 821, in unpack_url
hashes=hashes
File “/usr/local/lib/python2.7/site-packages/pip/download.py”, line 659, in unpack_http_url
hashes)
File “/usr/local/lib/python2.7/site-packages/pip/download.py”, line 882, in _download_http_url
_download_url(resp, link, content_file, hashes)
File “/usr/local/lib/python2.7/site-packages/pip/download.py”, line 603, in _download_url
hashes.check_against_chunks(downloaded_chunks)
File “/usr/local/lib/python2.7/site-packages/pip/utils/hashes.py”, line 46, in check_against_chunks
for chunk in chunks:
File “/usr/local/lib/python2.7/site-packages/pip/download.py”, line 571, in written_chunks
for chunk in chunks:
File “/usr/local/lib/python2.7/site-packages/pip/utils/ui.py”, line 139, in iter
for x in it:
File “/usr/local/lib/python2.7/site-packages/pip/download.py”, line 560, in resp_read
decode_content=False):
File “/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/response.py”, line 357, in stream
data = self.read(amt=amt, decode_content=decode_content)
File “/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/response.py”, line 324, in read
flush_decoder = True
File “/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/contextlib.py”, line 35, in __exit__
self.gen.throw(type, value, traceback)
File “/usr/local/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/response.py”, line 246, in _error_catcher
raise ReadTimeoutError(self._pool, None, ‘Read timed out.’)
ReadTimeoutError: HTTPSConnectionPool(host=’pypi.python.org‘, port=443): Read timed out.
去看看版本：
➜ 自动下单 python –version
Python 2.7.13
换上全局代理后再试试：
pip install -U selenium
还是出错：
【已解决】Mac中安装selenium出错：OSError Errno 13 Permission denied /usr/local/selenium
接着去解决：
【已解决】Mac中PyCharm中选用Python3结果：ModuleNotFoundError: No module named selenium
接着去写代码，调试看看效果。
结果又遇到：
通过chrome发现百度的输入框的name=wd
所以去参考：
http://cuiqingcai.com/2599.html
试试
试了半天，关于assert和文件编码，都是弄了半天都搞定：
（1）文件编码：
【已解决】Mac中PyCharm中Python代码调试报错：SyntaxError Non-ASCII character \xe7 in file on line but no encoding
（2）asset
asset的话，对于此处中文的百度，要写成：
assert u”百度” in driver.title |
才能最后asset成功：
因为此处的title本身是：
u’百度一下，你就知道’
所以要
assert u”百度” in driver.title
才能匹配到。
然后打印出来的百度搜索结果页面的html，内容很多：
然后可以看到浏览器的自动化操作的过程
显示打开百度首页
然后输入了crifan
然后回车触发页面搜索
显示出搜索结果
然后再继续研究，如何实现，找到对应的按钮，并点击按钮：
【已解决】Python中Selenium中如何实现模拟点击按钮
然后后续值得参考的帖子：
其中解释了：各种Selenium自带的driver和第三方，包括Chrome的driver
中文：
1. 安装 — Selenium-Python中文文档 2 documentation
英文：
1. Installation — Selenium Python Bindings 2 documentation
然后继续去添加截图功能：
然后看到：
Taking Screenshot Of A Page | Selenium Cooked With Python and Spiced With Java
去试试：Chrome的driver是否有窗口最大化
试了试：
driver.maximize_window()
或：
chromeOptions = webdriver.ChromeOptions()
chromeOptions.add_argument(“start-maximized”)
driver = webdriver.Chrome(chrome_options=chromeOptions)
结果都没有效果，窗口还是之前大小：
所以先不去管窗口最大化了。
然后遇到了：
【已解决】Selenium给输入框send_keys无法输入文字
【已解决】Selenium已通过ID获得元素后click出错：element is not attached to the page document
接着再去：