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interface, abstract python?

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Exuberant Earthworm answered on June 24, 2021 Popularity 9/10 Helpfulness 3/10

answer interface, abstract python?

related abstract class and interface in python

related interface, abstract python?

interface, abstract python?

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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)

Popularity 9/10 Helpfulness 3/10 Language python

Source: stackoverflow.com

Tags: abstract python

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Contributed on Jun 24 2021

Exuberant Earthworm

0 Answers Avg Quality 2/10

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abstract class and interface in python

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# Abstract class :
# A class with no constructor since it cannot be instantiated, extends ABC and has both abstract and concrete methods
# Any class that extends this abstract class must override the abstract methods
# The concrete methods are inherited by the child class
# Interface: This is nothing but a variation of abstract class where there is no concrete methods, all methods are abstract methods

###### Example of abstract class
from abc import ABC, abstractmethod

class Company(ABC):
  @abstractmethod
  def pay_taxes(self):
    pass

  def report_revenue(self):
    print(f"{self.name} is reporting ${self.revenue} of revenue")

class Manufacturing(Company):
  def __init__(self, name, revenue):
    self.name = name
    self.revenue = revenue
  
  def pay_taxes(self, tax_rate): # Implement the pay_taxes() method
    tax_amount = self.revenue * tax_rate
    print(f"{self.name} is paying ${tax_amount} of taxes")

# Create an instance of the Manufacturing class and Make call to the pay_taxes() method, observe report_revenue()
m = Manufacturing("Morgan's Manufacturing", 5000)
m.pay_taxes(0.1)
m.report_revenue()

###### Example of interface (All methods in the abstract class must be abstract methods)
class Business(ABC):
  @abstractmethod
  def sell_product(self, product_name, price, quantity):
    pass

# Create a class that inherits the Business interface
class Bakery(Business):
  def __init__(self, business_name):
    self.business_name = business_name

  # Provide a definition of the sell_product() method
  def sell_product(self, price, quantity, product_name):
    total_revenue = price * quantity
    print(f"""{self.business_name} sold {quantity} {product_name} for a total of ${total_revenue}""")

blue_eyed_baker = Bakery("Blue Eyed Baker") # Attempt to create a Bakery object

##### Example of Interface without explicitly using the "@abstractmethod" decorator : Duck typing approach
class Supplier:
  def take_order(self, product_name, quantity):
    pass

  def make_delivery(self, order_id, location):
    pass

class YogurtSupplier:
  def __init__(self):
    self.orders = {}
  
  # Finish defining the take_order() method
  def take_order(self, product_name, quantity):
    self.orders[f"{product_name}_{quantity}"] = {
      "product_name": product_name, "quantity": quantity
    }
  
  # Create a make_delivery() abstract method
  def make_delivery(self, order_id, location):
    print(f"Delivering order: {order_id} to {location}")
    del self.orders[order_id]

Popularity 9/10 Helpfulness 5/10 Language python

Source: Grepper

Tags: abstract-class abst

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Contributed on Aug 13 2024

Innocent Iguana

0 Answers Avg Quality 2/10

interface, abstract python?

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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()

Popularity 9/10 Helpfulness 3/10 Language python

Source: stackoverflow.com

Tags: abstract abstrac

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Contributed on Jun 24 2021

Exuberant Earthworm

0 Answers Avg Quality 2/10

interface, abstract python?

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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)

Popularity 9/10 Helpfulness 1/10 Language python

Source: stackoverflow.com

Tags: abstract abstrac

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Contributed on Jun 24 2021

Exuberant Earthworm

0 Answers Avg Quality 2/10

interface, abstract python?

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