class Item(object):
    
    rock = False
    paper = True
    scissor = False
    
    def __init__(self, number):
        self.number = number

    @staticmethod
    def static_method():
        print 'This is a static method'

    @classmethod
    def class_method(cls):
        print 'This is a class method that belongs to %s and the paper is' % cls, cls.paper

i = Item(8)
i.static_method()
i.class_method()
Item.static_method()
Item.class_method()

from datetime import datetime


def is_naive(dt):
 if dt.tzinfo is None:
     return True
 else:
     return False

class Date(object):
    def __init__(self, datetime):
        self.datetime = datetime
    
    @staticmethod
    def is_naive(dt):
     if dt.tzinfo is None:
         return True
     else:
         return False

            

from datetime import datetime
from  pytz import timezone

d1 = datetime.utcnow()
d2 = d1
utc = timezone("UTC")
d1 = utc.localize(d1)
print d1
print d2



d = Date(d1)
print Date.is_naive(d1)
print Date.is_naive(d2)
print d.is_naive(d1)
print d.is_naive(d2)

print is_naive(d1)
print is_naive(d2)

class Integer(object):
    
    some_class_attributes = 'So true!'
    
    def __init__(self, number):
        self.number = number
    
    @classmethod
    def new_number(cls, number):
        print cls.some_class_attributes
        return cls(number) # creating new integer instance

number = Integer(5)
print number.number

new_number = Integer.new_number(8)
print new_number.number

from random import choice

COLORS = ['Brown', 'Black', 'Golden']

class Animal(object):
    
    def __init__(self, color):
        self.color = color
        
    @classmethod
    def make_baby(cls):
        color = choice(COLORS)
        print cls
        return cls(color)
    
    @staticmethod
    def speak():
        print 'Roar!'
        

class Dog(Animal):

    @staticmethod
    def speak():
        print 'Bark!'
        
    @classmethod
    def make_baby(cls):
        print 'making dog baby'
        # do something dog specific
        return super(Dog, cls).make_baby()
    
        
class Cat(Animal):
    pass

d = Dog('Brown')
print d.color
pup = d.make_baby()
pup
print pup.color

pup.speak()
d.speak()
Dog.speak()
Animal.speak()

c = Cat('Red')
print c.color
kitty = c.make_baby()
print kitty.color
kitty.speak()