class Dog():

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

    def sit(self):
        print(self.name.title() + " is now sitting")

    def roll_over(self):
        print(self.name.title() + " rolled over")

my_dog = Dog("ww", 1)

print('my dog name is ' + my_dog.name.title())
print('my dog is ' + str(my_dog.age) + ' years old')
my_dog.sit()
my_dog.roll_over()