abc1.py

class Banking(object):
    """ Payment processor that does nothing, just logs """
    def __init__(self):
        self._logger = logging.getLogger(__name__)
        self._logger.setLevel(logging.INFO)

    def process_payment(self, destination_address, amount):
        """ Execute a payment to one receiving single address
        
        return the transaction id or None """
        print("process payment for bank.")