micropython-lib

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When I import multiprocessing, there is an error saying that:
File "main.py", line 5, in File "multiprocessing.py", line 3, in File "select.py", line 14, in AttributeError: 'NoneType' object has no attribute 'func'

Would you please help me solve this problem?

I get the same with the base64 module:

>>> %Run -c $EDITOR_CONTENT
Traceback (most recent call last):
  File "<stdin>", line 7, in <module>
  File "/lib/base64.py", line 9, in <module>
  File "/lib/re.py", line 11, in <module>
AttributeError: 'NoneType' object has no attribute 'func'

In both cases here the ffi modules for select and re respectively have been installed, but they can't find the referenced dynamic libraries.

@kitplummer if you see re.py", line 11, in https://github.com/micropython/micropython-lib/blob/f3cfc52ab076fc913dc6e266fb7370b418c8f542/unix-ffi/re/re.py#L11 it's clear pcre is None meaning the ffi command earlier couldn't find it https://github.com/micropython/micropython-lib/blob/f3cfc52ab076fc913dc6e266fb7370b418c8f542/unix-ffi/re/re.py#L6

@jimmo would it make most sense for ffilib.open() raise an exception if it can't find the library?

@andrewleech - thanks, eventually dug in enough to find that being the issue.

I'm working with a Raspberry Pico W, which apparently doesn't have the lib. :) Working around it now, but that might be worth adding to make it obviously clear.

Ah yes, the ffi based libs only work on Linux.

How did you install these libraries out of interest?

This repo is in the process of being reorganised a bit with the recent manifest file charges, working towards making library compatibility and installation easier and more reliable.

I installed with upip.

For posterity, I was trying to use urllib.parse for urlencode purposes - which pulls in micropython-re-pcre (and the ffilib dep) by default.

Ah thanks, that context definitely helps! urllib.parse is definitely something I can see as useful on rpi-w / networked boards, it'd be worth updating it to work with the built-in re module.

Should've mentioned, the quick-fix for me was to simply delete the re.py and ffilib.py files from the Pico's lib/ subdir - and using the built-in stuff.