micropython.native gone in 1.21 ?

[zcattacz]

Updated a ESP32-S2 to 1.21 firmware, and my previous CRC calc code ceased working. there was a small @native annotated portion.

 >>> sys.implementation
(name='micropython', version=(1, 21, 0), _machine='LOLIN_S2_MINI with ESP32-S2FN4R2', _mpy=10502)
 >>> from micropython import native
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: can't import name native

Just wondering, is this function removed from 1.21.0 ?

[jimmo]

Just wondering, is this function removed from 1.21.0 ?

The code generation decorators (native, viper, asm_xtensa, etc) do not actually exist in the micropython module. Rather the compiler detects them explicitly and handles them. See #11805 (comment)

The native decorator definitely still works in v1.21. I just tested it on an S2.

Can you share the code you're using?

[zcattacz]

Thank you, I got it.

I must have tried to make the code with @native inside compatible in cpython without actually testing it in 1.20.

try:
    from micropython import native  
except
    def native(fn):
        return fn

Is there any trick to let cpython ignore @micropython.native?

[jimmo]

Is there any trick to let cpython ignore @micropython.native?

The common thing to do here is to write a micropython.py that you use with CPython (but don't copy it to your device) that contains dummy decorators.

[zcattacz]

Hum, silly me. thanks.