structure.py

INQUIRY_RESP_FIELDS = (
    'Response Code',
    'Biller Name',
    'Bill Amount',
    'Bill Ref',  # STAN
    'Notification Message')

PAYMENT_RESP_FIELDS = (
    'Response Code',
    'Transaction ID',  # NTP
    'Bill Ref',  # STAN
    'Notification Message')

METHOD = {
    '021': 'inquiry',
    '022': 'payment',
    '023': 'reversal'}
METHOD_CODE = dict()
for key, value in METHOD.items():
    METHOD_CODE[value] = key