<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _update_partition_dci_id(self, tenant_name, dci_id, vrf_prof=None, part_name=None):
 """Function to update DCI ID of partition. """

        self.dcnm_obj.update_project(tenant_name, part_name, dci_id=dci_id,
                                     vrf_prof=vrf_prof)