abstract method python
# Python program showing
# abstract base class work
from abc import ABC, abstractmethod
class Animal(ABC):
def move(self):
pass
class Human(Animal):
def move(self):
print("I can walk and run")
class Snake(Animal):
def move(self):
print("I can crawl")
class Dog(Animal):
def move(self):
print("I can bark")
class Lion(Animal):
def move(self):
print("I can roar")
# Driver code
R = Human()
R.move()
K = Snake()
K.move()
R = Dog()
R.move()
K = Lion()
K.move()
Output:
I can walk and run
I can crawl
I can bark
I can roar
4
3
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)
Thank you!
3
4
(3 Votes)
0
0
0
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()
Thank you!
0
0
0
4
10
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)
Thank you!
10
4
(10 Votes)
0
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