What's mean 'opt=3' in manifest.py for frozen ?

[water]

In some manifest.py file, likes:

Code: Select all

freeze(
    "..",
    (
        "xx/xxx.py",
        ...
    ),
    opt=3,
)

What's mean

Code: Select all

opt=3

[jimmo]

What's mean

opt=3

It sets mp_optimise_value, which with a value of 3 will remove line number information from the bytecode (smaller firmware) and prevent emitting any code for "assert" statements.

[water]

Thanks.
It looks like not a python script.

[jimmo]

It looks like not a python script.

Not sure I follow sorry, what doesn't look like a python script?

[water]

Which language use manifest.py ?

[jimmo]

Which language use manifest.py ?

It's Python.

The example you provided (uasyncio/manifest.py) is a one-line Python program that calls the "freeze" function.

You can think of is as just regular Python (which it is, it's run by CPython) just with functions like "freeze" provided as globals. (Same way Python provides functions like "print").

[bradstew]

so 'opt=3' prevents emitting any code for "assert" statements. So if I am using assert, I should set it to another value?
Where can i find a list of the options?

[pythoncoder]

https://docs.micropython.org/en/latest/ ... .opt_level