1.学习使用appium
我使用的appium为appium GUI 版本，目前不了解appium client/Server之间的关系。
由于测试过程中准备使用Python写测试脚本，所以需要下载appium-python-client，方法如下：https://testerhome.com/topics/1080
在安装过程中，遇到如下问题：
运行setup.py出错图
解决办法如下：
bogon:Appium-Python-Client-0.27 baishuang$ sudo python setup.py install
2.运行脚本出错
出错截图
解决办法如下:卸载selenium，重新安装低版本，容易出现超时问题，可设置超时时间解决
pip --default-timeout=100 install -U selenium
3.下载pip工具
bogon:~ baishuang$ sudo easy_install pip
3.安装appium问题
本人之前安装dmg版本，运行打开手机计算器一直出错，错误提示：
selenium.common.exceptions.WebDriverException: Message: Parameters were incorrect. We wanted {"required":["desiredCapabilities"],"optional":["requiredCapabilities","sessionId","id"]} and you sent ["capabilities","desiredCapabilities"]
经上网试过不同方法无果后，发现自己的appium不能使用命令行方式打开，提示：comand not found.所以决定重新从命令行方式安装appium。过程如下：
（1）npm install -g appium提示请求拒绝，请切换root权限，但root权限安装会出现命令行打开appium打开失败 wIth root .所以采取修改文件权限来重新安装appium.坎坷。。。
bogon:~ baishuang$ sudo chmod -R 777 /usr/local/lib
bogon:~ baishuang$ npm uninstall appium -g
removed 535 packages in 4.555s
bogon:~ baishuang$ npm install -g appium
/usr/local/bin/appium -> /usr/local/lib/node_modules/appium/build/lib/main.js
> appium-chromedriver@4.0.0 install /usr/local/lib/node_modules/appium/node_modules/appium-chromedriver
> node install-npm.js
info Chromedriver Install Installing Chromedriver version '2.38' for platform 'mac' and architecture '64'
info Chromedriver Install Opening temp file to write chromedriver_mac64 to...
info Chromedriver Install Downloading https://chromedriver.storage.googleapis.com/2.38/chromedriver_mac64.zip...
RequestError: Error: connect ETIMEDOUT 172.217.160.80:443
at new RequestError (/usr/local/lib/node_modules/appium/node_modules/request-promise-core/lib/errors.js:14:15)
at Request.plumbing.callback (/usr/local/lib/node_modules/appium/node_modules/request-promise-core/lib/plumbing.js:87:29)
at Request.RP$callback [as _callback] (/usr/local/lib/node_modules/appium/node_modules/request-promise-core/lib/plumbing.js:46:31)
at self.callback (/usr/local/lib/node_modules/appium/node_modules/request/request.js:185:22)
at Request.emit (events.js:182:13)
at Request.onRequestError (/usr/local/lib/node_modules/appium/node_modules/request/request.js:877:8)
at ClientRequest.emit (events.js:182:13)
at TLSSocket.socketErrorListener (_http_client.js:382:9)
at TLSSocket.emit (events.js:182:13)
at emitErrorNT (internal/streams/destroy.js:82:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:50:3)
at process._tickCallback (internal/process/next_tick.js:63:19)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! appium-chromedriver@4.0.0 install: `node install-npm.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the appium-chromedriver@4.0.0 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/baishuang/.npm/_logs/2018-07-16T06_56_20_127Z-debug.log
bogon:~ baishuang$
bogon:~ baishuang$ sudo chmod -R 777 /usr/local
Password:
chmod: Unable to change file mode on /usr/local: Operation not permitted
bogon:~ baishuang$ sudo chmod -R 777 /usr/local/lib
bogon:~ baishuang$ npm uninstall appium -g
removed 535 packages in 4.555s
bogon:~ baishuang$ npm install -g appium
上述错误貌似不是导致问题的原因，通过命令行下载或通过dmg安装的版本，应该没有本质的区别。在appium GUI dmg安装版本中，经过selenium降版本（3.13-2.53.6，网上有好多降版本改的例子，尚不能确定是否有影响）
运行脚本提示出错
解决办法：(我的电脑里安装Python2.7 3.7 两个版本，并不影响)
from appium import webdriver -》from selenium import webdriver
preference截图
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下载版本连接：https://github.com/appium/appium-desktop/releases/tag/v1.6.2
类似问题解决：https://www.cnblogs.com/test-xiaocai/p/5810888.html
参考连接如下：
appium在Mac中的安装与使用
https://www.jianshu.com/p/612c2fa1dbe9
appium安装权限问题
https://testerhome.com/topics/1494
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