Data Abstraction

Data Abstraction:

• The concept of hiding the properties of one class from other class  or outside of the class is known as a abstraction or data hiding.

• Abstraction means hiding the properties of a class.

• in order to hide the properties of a class we use _ _ beginning of the property/attribute.

• example: _ _a = 10

class x:

    __a=100

    def display(self):

        print(x.__a)

x_obj=x( )

x_obj.display( )

print(x.__a)

100

Traceback (most recent call last):

  File "E:/python_practice/examples/data abstraction.py", line 7, in <module>

    print(x.__a)

AttributeError: type object 'x' has no attribute '__a'

Note:

• hidden properties of a class we can access from outside of that class using special syntax.

referenceVariableName._className_ _property/attribute-name


class x:
    __a=100
    def display(self):
        print(x.__a)
x_obj=x( )
x_obj.display( )

print(x_obj._x__a)

100

100