How Many Types Of Access Modifiers Are There In Python-

  • 1) Public

  • 2) Private

  • 3) Protected

1) Private-

– ‘__’ can be used to create private variable and method. – Private variable and methods can be accessed within the class.

		
class Emp:
    name = 'Rohit'  # public variable
    __salary = 17000  # Private variable because it has a syntax "__"

    def main():
        print(Emp.name)
        print(Emp.__salary)

Emp.main()
Output-
	Rohit
	17000
  • Qsn- Can we call the private methods of another class?
  • Answer-Yes, We can call private methods of another class by calling the public method of that class.

Ex-

class Test:
    def a1(self):
        print("a1")

    def __a2(self):
        print("a2")

    def a3(self):
        self.__a2()

class TestMain:
    def main():
        obj = Test()
        obj.a1()
        #obj.__a2()   --> Error AttributeError: 'Test' object has no attribute '_TestMain__a2'
        obj.a3()

TestMain.main()
		
Output- 
	a1
	a2

 

2) Protected-

(If you are new in Python. I will recommend to learn this concept after Inheritance) – ‘_’ is used to create protected variables and methods. – Another class variables and methods can be accessed by using protected Access Modifiers In Python only if we have the parent-child relationship even in modules also.
Ex-

a=10 #public
_a=10 #Protected
__a=10 #Private

Ex-

class Parent:
    def __init__(self, a, b):
        self._a = a
        self._b = b

    def display(self):
        print("a is-", self._a)
        print("b is-", self._b)


class Child(Parent):
    def __init__(self, a, b):
        Parent.__init__(self, a, b)

    def sum(self):
        c = self._a + self._b
        print("sum is-", c)


obj = Child(4, 3)
obj.display()
obj.sum()

Output-
	a is- 4
	b is- 3
	sum is- 7
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