Classes and Methods#
This is Exercise 3 of the Micro Python Tutorial.
We can define classes in Python. Classes are defined globally, within the file/module as they begin in column 0.
Within a class its functions are called methods. Unlike functions, methods are defined within the scope of the class and are therefore indented within the class's block.
A class has a constructor, a special method named __init__. All special methods in Python are surrounded by double underscores. (There are more of these but we'll get to them later.)
motor_controller.py#
class MotorController:
def
init(self):
self.port_forward_motor = Motor('pfwd')
self.stbd_forward_motor = Motor('sfwd')
print('motor controller ready.')
motor.py:#
class Motor:
def
init(self, name): self.motor_name = name self.motor_speed = 0 print('motor {} ready.'.format(self.motor_name)) def set_speed(self, speed): self.motor_speed = speed print("speed: {}".format(speed))
init(self, name): self.motor_name = name self.motor_speed = 0 print('motor {} ready.'.format(self.motor_name)) def set_speed(self, speed): self.motor_speed = speed print("speed: {}".format(speed))
def get_speed(self): return self.motor_speed
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