Python Class Prototype (Example) - Scope: Private, Public, Internal, Static

class_prototype.py

# -*- coding: utf-8 -*-

from random import randint


class MyClass(object):

    # Static class variable
    static_variable = 17

    def __init__(self, property_a, property_b=11):
        self.__property_a = property_a  # Private
        self.property_b = property_b  # Public
        self._property_c = "Internal property of the class"  # Internal

    @property
    def property_a(self):
        return self.__property_a

    @property_a.setter
    def property_a(self, value):
        self.__property_a = value

    @staticmethod
    def print_hello(name=None):
        print("Hello!" if name is None else "Hello {name}!".format(name=name))

    @staticmethod
    def random_number_from_0_to_10():
        return randint(0, 10)

    def print_class_values(self):
        print("Class properties: PropA=[{prop_a}] PropB=[{prop_b}] propC=[{prop_c}]".format(
            prop_a=self.__property_a,
            prop_b=self.property_b,
            prop_c=self._property_c
            )
        )


# Try MyClass
if __name__ == "__main__":
    print("Static variable: {}".format(MyClass.static_variable))
    MyClass.print_hello()
    MyClass.print_hello("RDCH106")
    print("Random number from 0 to 10: {}".format(MyClass.random_number_from_0_to_10()))

    my_class = MyClass(property_a=5)

    my_class.print_class_values()

    public_prop_b = 12
    print("Set public property B to {}".format(public_prop_b))
    my_class.property_b = public_prop_b
    my_class.print_class_values()

    private_prop_a = 7
    print("Set private property A to {}".format(private_prop_a))
    my_class.property_a = private_prop_a
    my_class.print_class_values()
    print("Get private property A to {}".format(my_class.property_b))

    # Internal variables of the class are also available. But be careful, are internal!
    internal_prop_a = "Internal property C modified!"
    print("Get internal property C: {}".format(my_class._property_c))
    my_class._property_c = internal_prop_a
    print("Set internal property C to \"{}\"".format(my_class._property_c))
    my_class.print_class_values()