This page (revision-21) was last changed on 2025-07-30 13:27 by Murray Altheim

This page was created on 2025-07-30 02:24 by Murray Altheim

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%%info
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%%
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The file {{main.py}} is special in MicroPython, only in the sense that when you power-on the device and/or press the reset button, the main.py file is executed.
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The file (also sometimes called a "script") named {{main.py}} is special in MicroPython, in the sense that when you power-on the device and/or press the reset button, the contents of the {{main.py}} file are passed to the MicroPython interpreter and the program contained within main.py is executed. It's the ''entry point'' for running any application in Python.
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%%python \\# this is a comment
%%python
\\# this is a comment
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print("hello again.") # you can use single or double quotes
print("hello again.")
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There is a structure in Python called a {{try-except-finally}} __block__, which is ideal for a main.py file:
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__See also:__ [The REPL|MicroPythonTutorialTheREPL]
%%filename main.py %%
%%python
\\# this is a comment
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try:
print('hello world.')
^^^^ 🠈 remember to indent the insides of your blocks by 4 characters!
except Exception as ex:
print('an error occurred: {}'.format(ex))
finally:
print('complete.')
%%
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__Previous:__ [MicroPython Tutorial|MicroPythonTutorial]: home page \\
__Previous:__ [MicroPython Tutorial Exercise 1|MicroPythonTutorialExercise01]: main.py \\