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

0 vote165 views1 answer
Requests.Session() proxies
Python
0 vote143 views1 answer
Remove stopwords from list of strings python
Python
4 votes96 views2 answers
How to scatter plot in matplotlib of two sets
Python
0 vote142 views1 answer
Creating a web page in python
Python
5 votes129 views2 answers
Does break stop all loops
Python
0 vote145 views1 answer
Attributeerror: module
Python
0 vote120 views1 answer
Button onclick message box in python tkinter
Python
0 vote151 views1 answer
Tech with tim
Python
91 votes128 views4 answers
String remove last 3 characters python
Python
0 vote126 views1 answer
Como eliminar palabras repetidos de una lista python
Python