How to use the pypx.utils.patientPath function in pypx

def processPatient(self, dcm_info, log_file, data_directory):
        # get information of interest
        patient_id = self.processDicomField(dcm_info, "PatientID")
        patient_name = self.processDicomField(dcm_info, "PatientName")
        self.dp.qprint('Processing %s...' % patient_id)

        # log it
        log_file.write('    PatientID: ' + patient_id + '\n')
        log_file.write('    PatientName: ' + patient_name + '\n')

        # create patient directory
        patient_directory = pypx.utils.patientPath(data_directory, patient_id, patient_name)
        self.mkdir(patient_directory, self.log_error)

        # Save a mapping from this series_uid to the acutal FS location
        # where the file will be written
        str_mapFile     = os.path.join(self.patient_mapDir, '%s.json' % patient_id)
        if not os.path.exists(str_mapFile):
            self.mapFile_save( {patient_id : patient_directory}, str_mapFile )

        # create patient.info file
        patient_info = configparser.ConfigParser()
        patient_info['PATIENT'] = {
            'PatientID': patient_id,
            'PatientName': patient_name,
            'Location': patient_directory
        }