gergob

class Phone(object):
    
    def __init__(self):
        print("Phone constructor invoked.")
    
    def call_number(self, phone_number):
        print("Calling number {}".format(phone_number))

gergob

#
# will be discussed later why only the constructor of Phone class was invoked
#
>>> my_iphone = SmartPhone()
Phone constructor invoked. 

>>> my_iphone.call_number("123456789")
Calling number 123456789

>>> my_iphone.install_software("python")

gergob

class Phone:
    
    def __init__(self):
        print("Phone constructor invoked.")
    
    def call_number(self, phone_number):
        print("Calling number {}".format(phone_number))

gergob

class Snake(Animal):
    __temperature = 28    
    
    def __init__(self, name, temperature):
        super().__init__(name, 2, True, 0)
        self.temperature = temperature 

    #
    # METHODS
    #

gergob

class Animal:
    __name = None
    __age = 0
    __is_hungry = False
    __nr_of_legs = 0

    def __init__(self, name, age, is_hungry, nr_of_legs):
        self.name = name
        self.age = age
        self.is_hungry = is_hungry

gergob

>>> from Gadget import Gadget
>>> my_iphone = Gadget(240,'iOS',1980,4)
>>> my_iphone.weight
240
>>> my_iphone.weight = 255
>>> my_iphone.weight
255
>>> 
>>> 
>>> my_iphone.operating_system

gergob

class Gadget:
    """A class used for modelling Gadgets in a web shop."""
    __weight = 100
    __operating_system = None
    __battery_capacity = 2000
    __screen_size = 1
 
    def __init__(self, weight, operating_system, battery_capacity, screen_size):
        self.__weight = weight
        self.__operating_system = operating_system

gergob

my_iphone = Gadget(weight = 128, operating_system="iOS", battery_capacity=2800, screen_size=4)

print(my_iphone.weight)
print(my_iphone.operating_system)
print(my_iphone.battery_capacity)
print(my_iphone.screen_size)

gergob

class Gadget:
    weight = 100
    operating_system = None
    battery_capacity = 2000
    screen_size = 1

    def __init__(self, weight, operating_system, battery_capacity, screen_size):
        self.weight = weight
        self.operating_system = operating_system
        self.battery_capacity = battery_capacity

gergob

class Gadget:
    weight = 100
    operating_system = None
    battery_capacity = 2000
    screen_size = 1

my_iphone = Gadget()