python abstract method

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python abstract method

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from abc import ABC, abstractmethod

class MyBaseClass(ABC):
    @abstractmethod
    def my_abstract_method(self):
        pass

class MySubClass(MyBaseClass):
    def my_abstract_method(self):
        print("Implementation of the abstract method")

# Attempting to create an instance of the abstract class will raise an error
# my_instance = MyBaseClass()  # This line will raise a TypeError

# Creating an instance of the subclass and calling the abstract method
my_instance = MySubClass()
my_instance.my_abstract_method()

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Contributed on Sep 12 2023

YOU.com

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python abstract method

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# Python program showing
# abstract base class work
 
from abc import ABC, abstractmethod
 
class Polygon(ABC):
 
    @abstractmethod
    def noofsides(self):
        pass
 
class Triangle(Polygon):
 
    # overriding abstract method
    def noofsides(self):
        print("I have 3 sides")
 
class Pentagon(Polygon):
 
    # overriding abstract method
    def noofsides(self):
        print("I have 5 sides")
 
class Hexagon(Polygon):
 
    # overriding abstract method
    def noofsides(self):
        print("I have 6 sides")
 
class Quadrilateral(Polygon):
 
    # overriding abstract method
    def noofsides(self):
        print("I have 4 sides")
 
# Driver code
R = Triangle()
R.noofsides()
 
K = Quadrilateral()
K.noofsides()
 
R = Pentagon()
R.noofsides()
 
K = Hexagon()
K.noofsides()

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Source: www.geeksforgeeks.org

Tags: abstract abstrac

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Contributed on Jun 09 2022

Prickly Partridge

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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]

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Contributed on Aug 13 2024

Innocent Iguana

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abstract class python

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An abstract class exists only so that other "concrete" classes can inherit from the abstract class.

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Contributed on Jul 17 2021

google it (mosbeh)

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abstract classes in python

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from abc import ABC, abstractmethod

class AbstractClassExample(ABC):
    @abstractmethod
    def method1(self):
        pass

    @abstractmethod
    def method2(self):
        pass

class ConcreteClassExample(AbstractClassExample):
    def method1(self):
        print("Implementation of method1")

    def method2(self):
        print("Implementation of method2")

# Trying to instantiate an abstract class will result in a TypeError
# abstract_class = AbstractClassExample() 

# We can instantiate and use a concrete class derived from the abstract class
concrete_class = ConcreteClassExample()
concrete_class.method1() # Output: Implementation of method1
concrete_class.method2() # Output: Implementation of method2

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Contributed on Sep 11 2023

YOU.com

0 Answers Avg Quality 2/10

Abstract Classes in Python

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# 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()

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Source: www.geeksforgeeks.org

Tags: python py

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Contributed on Oct 30 2022

Odd Opossum

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python abstract method

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