Code associated with blog post:

cat_class_1_method.py

def name_print(cat):
    '''Print the name of the cat.'''
    print "The cat is called %s." % cat.name

name_print(felix)

cat_class_1_var.py

felix.name = "Felix"
print felix.name

cat_class_2.py

class Cat(object):
    '''A Cat with name, temperament and weight components.'''
    
    def name_print(self):
        '''Print the name of the cat.'''
        print "The cat is called %s." % self.name
    
felix = Cat()
felix.name = "Felix"
felix.name_print()

cat_class_3.py

class Cat(object):
    '''A Cat with name, temperament and weight components.'''
    
    def __init__(self, name):
        '''A new cat with name value name.'''
        self.name = name
    
    def name_print(self):
        '''Print the name of the cat.'''
        print "The cat is called %s." % self.name
    
felix = Cat("Felix")
felix.name_print()

cat_class_4.py

class Cat(object):
    '''A Cat with name, temperament and weight components.'''
    
    def __init__(self, name):
        '''A new Cat with a name (string).'''
        self.name = name
    
    def __str__(self):
        '''Print the name of the cat.'''
        return "The cat is called %s." % self.name
    
felix = Cat("Felix")
print felix

cat_class_5.py

class Cat(object):
    '''A Cat with name, temperament and weight components.'''
    
    def __init__(self, name, temperament, weight):
        '''A new Cat with a name (string), temperament (string) 
        and weight (float).'''
        self.name = name
        self.temperament = temperament
        self.weight = weight
    
    def __str__(self):
        '''Print the Cat object.'''
        return "The cat is called %s. Its temperament is %s. It weighs %s kgs." \
    % (self.name, self.temperament, self.weight)
    
    def is_friendly(self):
        '''Prints the temperament of the cat.'''
        return self.temperament == "friendly"
    
    def if_weighs_more(self, cutoff_weight):
        '''Returns if cat weighs more than a specified value.'''
        return self.weight > cutoff_weight

felix = Cat("Felix", "friendly", 6)
print felix

felix.is_friendly()

felix.if_weighs_more(5)

cat_list.py

cats = ['Whiskers', 'Felix', 'Charley', 'Rosebud', 'Biddy']
print cats

cat_methods.py

cats.remove('Whiskers')
cats.append('Mr. Paws')
print cats

class_cat_1.py

class Cat(object):
    '''A Cat with name, temperament and weight components.'''
    
    pass
  
felix = Cat()

older_cat_class_1.py

class Older_Cat(Cat):
    '''A Cat aged over 8 years with name, temperament and 
    weight components.'''
    
    pass

older_cat_class_2.py

class Older_Cat(Cat):
    '''A Cat aged over 8 years with name, temperament and 
    weight components.'''
    
    def __init__(self, name, temperament, weight):
        '''A new Older_Cat with a name (string), temperament 
        (string) and weight (float).'''
        
        Cat.__init__(self, name, temperament, weight)

rosebud = Older_Cat("Rosebud", "cranky", 4)
print rosebud

rosebud.is_friendly()

rosebud.if_weighs_more(5)

older_cat_class_3.py

class Older_Cat(Cat):
    '''A Cat aged over 8 years with name, temperament and 
    weight components.'''
    
    def __init__(self, name, temperament, weight, illness):
        '''A new Older_Cat with a name (string), temperament 
        (string) and weight (float).'''
        
        Cat.__init__(self, name, temperament, weight)
        self.illness = illness
        
    def has_illness(self):
        '''Describes if the Older_Cat has any health conditions.'''
        if self.illness != "none":
            print "%s has %s. Please consult care plan." \
            % (self.name, self.illness)
        else:
            print "%s has no health conditions." % self.name

rosebud = Older_Cat("Rosebud", "cranky", 4, "arthritis")
print rosebud

rosebud.has_illness()