data_abstraction.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Sun Aug 14 22:06:24 2022

@author: shreyastaware
"""

# =============================================================================
# Data Abstraction 
# It hides the unnecessary code details from the user. Also,  when we do not
#  want to give out sensitive parts of our code implementation and this is
#  where data abstraction came.
# 
# Data Abstraction in Python can be achieved through creating abstract classes.
# =============================================================================

class MyClass:

	# Hidden member of MyClass
	__hiddenVariable = 0
	
	# A member method that changes
	# __hiddenVariable
	def add(self, increment):
		self.__hiddenVariable += increment
		print (self.__hiddenVariable)

# Driver code
myObject = MyClass()	
myObject.add(2)
myObject.add(5)

# how to access private/ hidden variables
print(myObject._MyClass__hiddenVariable)

# This line causes error
print (myObject.__hiddenVariable)