What is abstraction in python ?

handling the internal details show the functionality is call abstraction in pyhton

ABC predefine abstract class it present in abc module in pyhton

NOTE: Make your class abstract class. your class must be extends the ABC predefine abstract class in python

We not create a object of abstract classes in python

 from abc import ABC,abstractmethod
class A10(ABC):
	@abstractmethod
	def getDebitCard(self):
		pass 
	@abstractmethod
	def getCreditCard(self):
		pass
class B10(A10):
	def getDebitCard(self,amount):
		return amount
	def getCreditCard(self,amount):
		return amount
a10=A10()
print(a10.getCreditCard(100000))
print(a10.getDebitCard(2000000))	

 TypeError: Can't instantiate abstract class A10 with abstract methods getCreditCard, getDebitCard

Here, Create child class object.using this object access abstract class implemented method

from abc import ABC,abstractmethod
class A10(ABC):
	@abstractmethod
	def getDebitCard(self):
		pass 
	@abstractmethod
	def getCreditCard(self):
		pass
class B10(A10):
	def getDebitCard(self,amount):
		return amount
	def getCreditCard(self,amount):
		return amount
b10=B10()
print(b10.getCreditCard(100000))
print(b10.getDebitCard(2000000))
 

100000
2000000
 

If any class extends to abstract class.there can provide own implementation

 from abc import ABC,abstractmethod
class A10(ABC):
	@abstractmethod
	def getDebitCard(self):
		pass 
class B10(A10):
	def getDebitCard(self,amount):
		return amount
class D10(A10):
	def getDebitCard(self,amount):
		return amount

b1=B10()
print(b1.getDebitCard(500000))	
d2=D10()
print(d2.getDebitCard(600000))
 

500000
600000
 

if we extends the abstract class must implement all method

from abc import ABC,abstractmethod
class A10(ABC):
	@abstractmethod
	def getDebitCard(self,message):
		pass 
	@abstractmethod	
	def getCreditCard(self,message):
		pass 	
class B10(A10):
	def getDebitCard(self,message):
		return message
b10=B10()
print(b10.getDebitCard("By B10"))	
print(b10.getCreditCard("By D10")

 TypeError: Can't instantiate abstract class B10 with abstract methods getCreditCard
 

if we extends the abstract class must implement all method.Create number of child classes

from abc import ABC,abstractmethod
class A10(ABC):
	@abstractmethod
	def getDebitCard(self,message):
		pass 
	@abstractmethod	
	def getCreditCard(self,message):
		pass 	
class B10(A10):
	def getDebitCard(self,message):
		return message
class D10(B10):
	def getCreditCard(self,message):
		return message
d1=D10()
print(d1.getDebitCard("By B10"))	
print(d1.getCreditCard("By D10"))

By B10
By D10
 

 from abc import ABC,abstractmethod
class CalAbc:
	def __init__(self,a,b):
		print("CalAbc")
		self.a=a
		self.b=b
	@abstractmethod	
	def display(self):
			pass	
class CalImpl1(CalAbc):
	def display(self):
		return self.a+self.b 			
class CalImpl2(CalAbc):
	def display(self):
		return self.a/self.b 			
class CalImpl3(CalAbc):
	def display(self):
		return self.a*self.b 			
class CalImpl4(CalAbc):
	def display(self):
		return self.a%self.b 
print(CalImpl1(100,200).display());
print(CalImpl1(153,2).display());
print(CalImpl1(100,300).display());					
print(CalImpl1(153,2).display());
 

CalAbc
300
CalAbc
155
CalAbc
400
CalAbc
155