code: def retrieve_network_info(self, tenant_id, direc):
          
          serv_obj = self.get_service_obj(tenant_id)
          net_dict = self.retrieve_dcnm_net_info(tenant_id, direc)
          if net_dict:
              return net_dict
          net_dict = self.fill_dcnm_net_info(tenant_id, direc)
          serv_obj.store_dcnm_net_dict(net_dict, direc)
          return net_dict
docs: Retrieve the DCNM Network information.
  
          Retrieves DCNM net dict if already filled, else, it calls
          routines to fill the net info and store it in tenant obj.