Interface, abstract python?

from abc import ABC, abstractmethod

class AccountingSystem(ABC):

    @abstractmethod
    def create_purchase_invoice(self, purchase):
        pass

    @abstractmethod
    def create_sale_invoice(self, sale):
        log.debug('Creating sale invoice', sale)

Source: stackoverflow.com

Interface, abstract python?

class GizmoAccountingSystem(AccountingSystem):

    def create_purchase_invoice(self, purchase):
        submit_to_gizmo_purchase_service(purchase)

    def create_sale_invoice(self, sale):
        super().create_sale_invoice(sale)
        submit_to_gizmo_sale_service(sale)

Source: stackoverflow.com

Interface, abstract python?

from abc import ABCMeta, abstractmethod

class IInterface:
    __metaclass__ = ABCMeta

    @classmethod
    def version(self): return "1.0"
    @abstractmethod
    def show(self): raise NotImplementedError

class MyServer(IInterface):
    def show(self):
        print 'Hello, World 2!'

class MyBadServer(object):
    def show(self):
        print 'Damn you, world!'


class MyClient(object):

    def __init__(self, server):
        if not isinstance(server, IInterface): raise Exception('Bad interface')
        if not IInterface.version() == '1.0': raise Exception('Bad revision')

        self._server = server


    def client_show(self):
        self._server.show()


# This call will fail with an exception
try:
    x = MyClient(MyBadServer)
except Exception as exc:
    print 'Failed as it should!'

# This will pass with glory
MyClient(MyServer()).client_show()

Source: stackoverflow.com

Similar codes

3 votes198 views2 answers
Python how to split a number
Python
2 votes173 views3 answers
How to unlist a list in python
Python
0 vote246 views2 answers
Dictionary changed size during iteration after pop function
Python
3 votes178 views4 answers
Django setup in windows
Python
0 vote210 views1 answer
Python numpy read from stdin
Python
4 votes194 views2 answers
__call__ python
Python
0 vote187 views1 answer
Networkx max degree node
Python
0 vote188 views1 answer
Knn example
Python
2 votes188 views3 answers
Miles to km in python
Python
0 vote181 views2 answers
Set points size in geopandas plot
Python