Essential features of object oriented programming:-

• Data hiding
• Inheritance
• Overriding
• Polymorphism

Data hiding is the process of hiding the details of an object and function. It is also a potent technique in programming that results in data security and less data complexity.

In python, if we want to hide the variable, then we need to write double underscore (__) before the variable name.

Syntax:-

__variablename

e.g.,

class democlass: 
	__hiddenVariable = 0
	def add(self, increment): 
		self.__hiddenVariable += increment 
		print (self.__hiddenVariable) 
demoobject = democlass()	 
demoobject.add(2) 
demoobject.add(5) 
print (demoobject.__hiddenVariable) 

Output-
4
12
error

This is all about data hiding in python.