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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
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%%info
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%%
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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'' (the left-most position on a line, with no indentation).
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.
A function is a block that defines a series of lines we want to execute when the function is called. We can pass zero or more __arguments__ (variables) to the function.
At line 9 changed 3 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
%%filename main.py %%
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class MotorController:
\\# we define a function called "display_message", passing a single argument named "message"
def display_message(message):
print(message)
raise Exception('we did something wrong.')
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def \\__init__(self):
self.port_forward_motor = Motor('pfwd')
self.stbd_forward_motor = Motor('sfwd')
print('motor controller ready.')
%%
try:
At line 21 changed 11 lines
!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))
# we call or execute the function here
display_message('hello world.')
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def get_speed(self):
return self.motor_speed
except Exception as e:
print('an error occurred: {}'.format(e))
finally:
print('complete.')
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----
__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