code: def list_services():
      
      for importer, modname, ispkg in pkgutil.iter_modules(services.__path__):
          if ispkg is False:
              importer.find_module(modname).load_module(modname)
  
      services_list = list()
      for s in services.serviceBase.__subclasses__():
          services_list.append(s.__name__.lower())
  
      return services_list
docs: returns list of available services