python+Appium环境搭建
第一、安装和配置android SDK
关于安装和配置android SDK的方式，可以查看下面的链接
http://www.cnblogs.com/JcHome/p/8268477.html
第二、安装Node.js
Node.js的下载路径：http://nodejs.cn/download/
检查node.js是否正常：node -v
第三、安装Appium
Appium的下载路径：https://bitbucket.org/appium/appium.app/downloads/
安装过程比较简单，基本上都是下一步
安装完成后，配置环境变量，在path路径中添加：安装路径下的node_modules\.bin路径；如：D:\tools\appium\Appium\node_modules\.bin;
在dos中输入：appium-doctor，显示如下信息说明安装正常
第四、安装Python
python下载路径：https://www.python.org/
python安装步骤在此，忽略下面是python的环境变量配置：
（添加一个python_home变量，值为：python的安装路径）
（将python_home添加到path环境变量中）
（出现上图信息，表示python环境变量已经配置成功）
安装setuptools工具，下载路径：https://pypi.python.org/pypi/setuptools/
下载后解压，cd 进入到解压目录中
执行python setup.py install 进行setuptools工具的安装
安装pip工具，下载路径：https://pypi.python.org/pypi/pip
下载完成后，也是解压，然后进入到解压的目录，含有如下目录
执行python setup.py install 命令，进行安装
pip工具安装完成后，在python路径下的Scripts目录中，会显示有pip.exe的可执行文件，通过这个工具可以从网下下载其他的python第三方共享的插件
第五、安装Appium-Python-Client
进入python/Scripts目录，通过pip命令安装Appium-Python-Client
安装完成后，可以通过pip show Appium-Python-Client 指令查看版本信息
测试脚本
常见问题：
1.chromedriver.exe 与android 的chrome 内核版本号不匹配，导致启动链接appium 失败
info: Chromedriver: Changed state to 'stopped'
> warn: Chromedriver for context WEBVIEW_com.tencent.mm:tools stopped unexpectedly
> error: Chromedriver: Chromedriver exited unexpectedly with code null, signal SIGTERM
> warn: Chromedriver quit unexpectedly, but it wasn't the active context, ignoring
> error: Chromedriver: Error: A new session could not be created. (Original error: session not created exception
> from unknown error: Runtime.executionContextCreated has invalid 'context': {"auxData":{"frameId":"11998.1","isDefault":true},"id":1,"name":"","origin":"://"}
> (Session info: chrome=57.0.2987.132)
> (Driver info: chromedriver=2.19.346078 (6f1f0cde889532d48ce8242342d0b84f94b114a1),platform=Windows NT 10.0 x86_64))
> at JWProxy.command$ (lib/proxy.js:133:15)
> at tryCatch (E:\tools\App_tools\Appium\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\regenerator\runtime.js:67:40)
> at GeneratorFunctionPrototype.invoke [as _invoke] (E:\tools\App_tools\Appium\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\regenerator\runtime.js:315:22)
> at GeneratorFunctionPrototype.prototype.(anonymous function) [as next] (E:\tools\App_tools\Appium\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\regenerator\runtime.js:100:21)
> at GeneratorFunctionPrototype.invoke (E:\tools\App_tools\Appium\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\regenerator\runtime.js:136:37)
> at bound (domain.js:284:14)
> at GeneratorFunctionPrototype.runBound (domain.js:297:12)
> at run (E:\tools\App_tools\Appium\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\node_modules\core-js\library\modules\es6.promise.js:89:39)
> at E:\tools\App_tools\Appium\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\node_modules\core-js\library\modules\es6.promise.js:100:28
> at flush (E:\tools\App_tools\Appium\Appium\node_modules\appium\node_modules\appium-chromedriver\node_modules\appium-jsonwp-proxy\node_modules\babel-runtime\node_modules\core-js\library\modules\$.microtask.js:17:13)
> at process._tickDomainCallback (node.js:381:11)
> { [Error: A new session could not be created. (Original error: session not created exception
> from unknown error: Runtime.executionContextCreated has invalid 'context': {"auxData":{"frameId":"11998.1","isDefault":true},"id":1,"name":"","origin":"://"}
> (Session info: chrome=57.0.2987.132)
> (Driver info: chromedriver=2.19.346078 (6f1f0cde889532d48ce8242342d0b84f94b114a1),platform=Windows NT 10.0 x86_64))]
> status: 33,
> value: { message: 'session not created exception\nfrom unknown error: Runtime.executionContextCreated has invalid \'context\': {"auxData":{"frameId":"11998.1","isDefault":true},"id":1,"name":"","origin":"://"}\n (Session info: chrome=57.0.2987.132)\n (Driver info: chromedriver=2.19.346078 (6f1f0cde889532d48ce8242342d0b84f94b114a1),platform=Windows NT 10.0 x86_64)' },
> httpCode: 200 }
解决方式：
下载对应的chrome的chromedriver.exe版本号，放到Appium\Appium\node_modules\appium\node_modules\appium-chromedriver\chromedriver\win路径下，重启appium，即可
chromedriver 驱动下载地址：http://chromedriver.storage.googleapis.com/index.html
