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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def allocate_hosting_port(self, context, router_id, port_db, network_type, hosting_device_id):
 """Allocates a hosting port for a logical port. We create a hosting port for the router port """

        l3admin_tenant_id = self._dev_mgr.l3_tenant_id()
        hostingport_name = 'hostingport_' + port_db['id'][:8]
        p_spec = {'port': {
                  'tenant_id': l3admin_tenant_id,
                  'admin_state_up': True,
                  'name': hostingport_name,
                  'network_id': port_db['network_id'],
                  'mac_address': bc.constants.ATTR_NOT_SPECIFIED,
                  'fixed_ips': [],
                  'device_id': '',
                  'device_owner': '',
                  'port_security_enabled': False}}
        try:
            hosting_port = self._core_plugin.create_port(context, p_spec)
        except n_exc.NeutronException as e:
            LOG.error('Error %s when creating hosting port'
                      'Cleaning up.', e)
            self.delete_hosting_device_resources(
                context, l3admin_tenant_id, hosting_port)
            hosting_port = None
        finally:
            if hosting_port:
                return {'allocated_port_id': hosting_port['id'],
                        'allocated_vlan': None}
            else:
                return None