code: def install(self, filepath):
          ''' TODO(ssx): not tested. '''
          if not os.path.exists(filepath):
              raise EnvironmentError('file "%s" not exists.' % filepath)
  
          ideviceinstaller = must_look_exec('ideviceinstaller')
          os.system(subprocess.list2cmdline([ideviceinstaller, '-u', self.udid, '-i', filepath])f install(self, filepath):
          ''' TODO(ssx): not tested. '''
          if not os.path.exists(filepath):
              raise EnvironmentError('file "%s" not exists.' % filepath)
  
          ideviceinstaller = must_look_exec('ideviceinstaller')
          os.system(subprocess.list2cmdline([ideviceinstaller, '-u', self.udid, '-i', filepath]))
docs: TODO(ssx): not tested.