This page (revision-14) was last changed on 2025-07-30 12:56 by Murray Altheim

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Page References

Incoming links Outgoing links
Micro Python Tutorial Exercise 03
MicroPythonTutorialExercise03

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At line 1 changed one line
!!! Classes and Methods
!!! Functions
At line 5 changed one line
We can define __classes__ in Python. Classes are defined globally, within the file/module as they begin in column 0.
We can define __functions__ in Python. Functions are defined globally, within the file/module as they begin in column 0.
At line 7 changed one line
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.
%%filename main.py %%
%%python
\\# we define a function called "display_message"
def display_message(message):
print(message)
raise Exception('we did something wrong.')
At line 9 removed 39 lines
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
%%python {{{
from motor import Motor
class MotorController:
def __init__(self):
self.port_forward_motor = Motor('pfwd')
self.stbd_forward_motor = Motor('sfwd')
print('motor controller ready.')
}}}
%%
!motor.py:
%%python {{{
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))
def get_speed(self):
return self.motor_speed
}}}
%%
!main.py:
%%python {{{
from motor_controller import MotorController
At line 49 changed 6 lines
motor_ctrl = MotorController()
except Exception as ex:
print('an error occurred: {}'.format(ex))
display_message('hello world.')
except Exception as e:
print('an error occurred: {}'.format(e))
At line 57 removed one line
}}}
At line 61 changed 2 lines
__Previous:__ [MicroPython Tutorial Exercise 2|MicroPythonTutorialExercise02]: functions \\
__Next:__ [MicroPython Tutorial Exercise 4|MicroPythonTutorialExercise04]: using classes
__Previous:__ [MicroPython Tutorial Exercise 2|MicroPythonTutorialExercise02]: blocks \\
__Next:__ [MicroPython Tutorial Exercise 4|MicroPythonTutorialExercise04]: classes
This page (revision-14) was last changed on 2025-07-30 12:56 by Murray AltheimTop