docs: def exec(self, args):
          """todo: Docstring for exec
  
          :param args: arg description
          :type args: type description
          :return:
          :rtype:
          """
  
          logger.debug("query %s", args.query)
  
          pl = Repo.installed_list()
          if not pl:
              print("No packages installed, use 'upkg install'")
  
          idx = 1
          for p in pl:
              print("[%s] %s" % (idx, p))
              idx += 1