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

2 votes115 views1 answer
Set http response content type django
Python
-1 vote111 views1 answer
Python : search file for string
Python
2 votes108 views1 answer
Install telethon
Python
0 vote117 views1 answer
Binarize array python
Python
-2 votes109 views3 answers
Python i++
Python
2 votes107 views4 answers
Python switch
Python
1 vote110 views1 answer
How to download a page in python
Python
1 vote134 views1 answer
Discord.py unmute
Python
0 vote115 views1 answer
Python increment char a to b az to ba
Python
36 votes117 views6 answers
Python pandas
Python