code: def op_list_apps(self):
          
          self.logger.info('Listing known applications ...')
          apps = self.get_apps()
          for app in apps:
              self.logger.info('Found `%s`' % app)
          else:
              self.logger.info('\nDONE. No applications found in `%s` directory.\n' % APPS_DIRNAME)
          return apps
docs: Prints out and returns a list of known applications.
  
          :rtype: list
          :return: list of applications