This page (revision-7) was last changed on 2025-07-30 13:21 by Murray Altheim

This page was created on 2025-07-30 05:22 by Murray Altheim

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Page References

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Micro Python Tutorial Exercise 04
MicroPythonTutorialExercise04

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%%info
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%%
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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.)
A class has a __constructor__, a special method named {{{__init__}}}. The constructor is called when you create a new object of the class. It can be said that the new object has a type of its class.
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!motor_controller.py
%%info
All special methods in Python are surrounded by double underscores. (There are more of these but we'll get to them later.)
%%
%%filename boo.py %%
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class Boo:
__init__(self):
print('boo!')
}}} %%
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Now let's enter the Python REPL and use our new class:
%%repl {{{
/pyboard> repl
Entering REPL. Use Control-X to exit.
>
MicroPython v1.25.0 on 2025-04-15; Raspberry Pi Pico with RP2040
Type "help()" for more information.
>>>
>>> from boo import Boo
>>> b = Boo()
boo!
>>>
>>> print(b)
<Boo object at 20005f50>
>>>
>>> print(type(b))
<class 'Boo'>
>>>
}}} %%
%%info
__What did we do?__
After creating a class named {{Boo}},
# we imported the class ("{{from boo import Boo}}") so the interpreter was aware of it,
# then we ''instantiated'' (created an instance of) an object of the Boo class ("{{b = Boo()}}") and we assigned the object a name "b". Notice that when we created the object, the print line in Boo's constructor was executed ("boo!")
# then we printed the object (the interpreter returned a default result "{{<Boo object at 20005f50>}}"),
# then we printed the type of the object ("{{print(type(b))}}")
%%
%%filename motor_controller.py %%
%%python {{{
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!motor.py:
%%filename motor.py %%
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!main.py:
%%filename main.py %%
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This page (revision-7) was last changed on 2025-07-30 13:21 by Murray AltheimTop