I am very new to Python, and unable to print any thing when i use a class. however i use a normal code without class it works : for the simplest code

class Dog():

    def __init__(self, color, height, breed):
        self.color = color
        self.height = height
        self.breed = breed

        my_dog = Kolin(color='brown', height='1 feet', breed='german shephered')
        print(type(my_dog))
        print(my_dog.color)

Process finished with exit code 0 and nothing is printed
Note: it is on selenium python setup