python.typeerror:

#coding: utf-8

class (object):
    
    def run(self):
        print("Animal is running...")

class Dog(Animal):

    def run(self):
        print("Dog is running...")

def run_twice(animal):
    animal.run()
    animal.run()

run_twice(Animal())
run_twice(Dog())

class Tortolse(Animal):
    def run(self):
        print("Tortolse is running slowly...")

run_twice(Tortolse)