code: def open_application(self, remote_url, alias=None, **kwargs):
          
          desired_caps = kwargs
          application = webdriver.Remote(str(remote_url), desired_caps)
  
          self._debug('Opened application with session id %s' % application.session_id)
  
          return self._cache.register(application, alias)
docs: Opens a new application to given Appium server.
          Capabilities of appium server, Android and iOS,
          Please check https://github.com/appium/appium/blob/master/docs/en/writing-running-appium/server-args.md
          | *Option*            | *Man.* | *Description*     |
          | remote_url          | Yes    | Appium server url |
          | alias               | no     | alias             |
  
          Examples:
          | Open Application | http://localhost:4723/wd/hub | alias=Myapp1         | platformName=iOS      | platformVersion=7.0            | deviceName='iPhone Simulator'           | app=your.app                         |
          | Open Application | http://localhost:4723/wd/hub | platformName=Android | platformVersion=4.2.2 | deviceName=192.168.56.101:5555 | app=${CURDIR}/demoapp/OrangeDemoApp.apk | appPackage=com.netease.qa.orangedemo | appActivity=MainActivity |