gistfile1.py

### Hettinger's way

# robot.py

class Robot(object):
	def move(self):
		print('Movement')

class CleaningRobot(Robot):
	def clean(self):
		for i in range(3):
			super().move()

# test.py

class MockBot(Robot):
	def move(self):
		print('Simulated movement')

class MockedCleaningRobot(CleaningRobot, MockBot):
	pass

MockedCleaningRobot().clean()

### How I usually do it

# robot.py

class CleaningRobot(object):
	def clean(self):
		for i in range(3):
			self.move()

	def move(self):
		print('Movement')

# test.py

class MockedCleaningRobot(CleaningRobot):
	def move(self):
		print('Simulated movement')

MockedCleaningRobot().clean()