Access Modifiers:
=================
In Java:
========
public ==> the public data, can allow to access in anywhere
private ==> can allow to access within the class.
protected ==>

In Python:
==========
public access modifiers ==> any normal data in class

# Public Access Modifiers
class publicAccessModifiers:
    # attributes which are public type
    a = 100
    b = 12.234
    c = 12-24j

    # public method
    def publicMethod(self):
        print("The First Attribute = ",self.a)
        print("The Second Attribute = ",self.b)
        print("The Third Attribute = ",self.c)

    print("The Class Variable1 = ",a)
    print("The Class variable2 = ",b)
    print("The Class variable3 = ",c)

pma = publicAccessModifiers()

pma.publicMethod()
print(pma.a)
print(pma.b)
print(pma.c)


private access modifiers ==> __ (variable should be prefixed)

# Private Access Modifiers

class privateAccessModifiers:
    # public data
    a = 10
    b = 20

    # private data
    __p = 123
    __q = 321

    print(__p,__q)

    def __privateMethod(self):
        # access the public data
        print("Public data1 = ",self.a)
        print("Public data2 = ",self.b)

        # access the private data
        print("Private data1 = ",self.__p)
        print("Private data2 = ",self.__q)

    def publicMethod(self):
        print("The Private data of the class are = ")
        print(self.__p)
        print(self.__q)

obj = privateAccessModifiers()
obj.publicMethod()
# obj.__privateMethod()
# print(obj.__p)

protected access modifiers ==> _ (variable should be prefixed) 

# Protected Access Modifiers

class protectedModifiers:
    _a = 1212
    _b = "String"

    print("The Protected Data = ")
    print(_a)
    print(_b)

    def _met1(self):
        print("The Protected data = ")
        print(self._a)
        print(self._b)

    def __met2(self):
        print("The Protected Data = ")
        print(self._a)
        print(self._b)

    def met3(self):
        print("The Protected Data = ")
        print(self._a)
        print(self._b)
        self.__met2()

obj = protectedModifiers()
# obj._met1()
obj.met3()

print(obj._a)

==========================================================

Instance Methods:
=================
the methods which can define with "self" as parameter ==> are called as "instance methods".
==> Instance methods can always allowed to access with an object.

# Instance Methods

class Student:
    def __init__(self,sname, sroll, smarks):
        self.sname = sname
        self.sroll = sroll
        self.smarks = smarks

    def instance(self):
        print("The Student data = ")
        print("Name = ",self.sname)
        print("Roll = ",self.sroll)
        print("Marks = ",self.smarks)

stu = Student("Ayan",12,78)
stu.instance()
# Student.instance(123)

Instance Variables:
===================
==> the variables inside the instance method called as "Instance Variables".

#Instance Variables

class calculator:
    def addition(self):
        self.a = 100
        self.b = 200

        print("sum = ",self.a + self.b)

    def product(self):
        print("product = ",self.a * self.b)

cal = calculator()

cal.addition()
cal.product()

print(cal.a)
print(cal.b)

# print(calculator.a)