'Get director port details.
:param array: the array serial number
:param port_id: the port id
:returns: port dict, or None'

def get_port(self, array, port_id):

    dir_id = port_id.split(':')[0]
    port_no = port_id.split(':')[1]
    resource_name = ('%(directorId)s/port/%(port_number)s' % {'directorId': dir_id, 'port_number': port_no})
    return self.get_resource(array, SLOPROVISIONING, 'director', resource_name=resource_name)
