How to use the cartoview.app_manager.installer.AppInstaller function in cartoview

def delete_application_on_fail(self, appname):
        from cartoview.app_manager.installer import AppInstaller
        AppInstaller(appname).uninstall(restart=True)

def delete_application_on_fail(self, appname):
        from cartoview.app_manager.installer import AppInstaller
        AppInstaller(appname).uninstall(restart=True)

try:
                    installed_app = App.objects.get(name=self.name)
                    if installed_app.version < self.version.version:
                        self.upgrade = True
                    else:
                        raise AppAlreadyInstalledException()
                except App.DoesNotExist:
                    # NOTE:the following code handle if app downloaded and for
                    # some reason not added to the portal
                    self._rollback()
            installed_apps = []
            for name, version in list(self.version.dependencies.items()):
                # use try except because AppInstaller.__init__ will handle
                # upgrade if version not match
                try:
                    app_installer = AppInstaller(
                        name, self.store.id, version, user=self.user)
                    installed_apps += app_installer.install(restart=False)
                except AppAlreadyInstalledException as e:
                    logger.error(e.message)
            self._download_app()
            importlib.reload(pkg_resources)
            self.check_then_finlize(restart, installed_apps)
            return installed_apps

def uninstall_app(request, store_id, app_name):
    response_data = {"success": False, "errors": []}
    try:
        installer = AppInstaller(app_name, store_id, user=request.user)
        installer.uninstall(restart=False)
        response_data["success"] = True
    except Exception as ex:
        logger.error(ex.message)
        response_data["errors"].append(ex.message)
    return HttpResponse(
        json.dumps(response_data), content_type="application/json")

def delete_application_on_fail(self, appname):
        from cartoview.app_manager.installer import AppInstaller
        AppInstaller(appname).uninstall(restart=True)

var currentApp = appsHash[installedApp.name];
                if(dependents.indexOf(currentApp) == -1 &&
                 currentApp.latest_version.dependencies[app.name]){
                    dependents.push(currentApp)
                    _getDependents(currentApp, appsHash, dependents)
                }

            });

        :return:
        """
        with lock:
            uninstalled = False
            installed_apps = App.objects.all()
            for app in installed_apps:
                app_installer = AppInstaller(
                    app.name, self.store.id, app.version, user=self.user)
                dependencies = app_installer.version.dependencies \
                    if app_installer.version else {}
                if self.name in dependencies.keys():
                    app_installer.uninstall(restart=False)
            try:
                installer = importlib.import_module('%s.installer' % self.name)
                installer.uninstall()
            except ImportError as e:
                logger.error(e.message)
            self.completely_remove()
            uninstalled = True
            if restart:
                RestartHelper.restart_server()
            return uninstalled