ImportError: cannot import name 'NOTHING' from 'attr' (unknown location)

[stormsnsnow]

Short Information

• Used Toolkit version: 1.0.4
• Operating System: Windows 11 24H2

Problem Definition Briefly (might be explained in steps)

• When starting MapSyncer upon rebooting device, an error message appears.
• ImportError: cannot import name 'NOTHING' from 'attr' (unknown location)
• This is fixed briefly by installing mapsyncer again but runs into a message saying that attrs is incompatible with referencing.
• ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
  referencing 0.36.2 requires attrs>=22.2.0, but you have attrs 21.2.0 which is incompatible.
  when trying to install mapsyncer and mapilio-kit, it runs into a conflict issue
  ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
  mapilio-kit 3.0.5 requires attrs==21.2.0, but you have attrs 25.3.0 which is incompatible.

Expected Output

• To start properly and without errors.

Actual Output

Traceback (most recent call last):
File "", line 198, in _run_module_as_main
File "", line 88, in _run_code
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Scripts\RunMapSyncer.exe__main.py", line 4, in
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Lib\site-packages\MapSyncer\app.py", line 10, in
from mapilio_kit.base import authenticator
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Lib\site-packages\mapilio_kit\base__init.py", line 1, in
from mapilio_kit.base.loader import Upload
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Lib\site-packages\mapilio_kit\base\loader.py", line 2, in
from mapilio_kit.components.upload.upload import upload
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Lib\site-packages\mapilio_kit\components\upload\upload.py", line 8, in
from mapilio_kit.components.upload import uploader
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Lib\site-packages\mapilio_kit\components\upload\uploader.py", line 13, in
import jsonschema
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Lib\site-packages\jsonschema__init.py", line 13, in
from jsonschema._format import FormatChecker
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Lib\site-packages\jsonschema_format.py", line 11, in
from jsonschema.exceptions import FormatError
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Lib\site-packages\jsonschema\exceptions.py", line 13, in
from attrs import define
File "C:\Users\storm\AppData\Local\Programs\Python\Python312\Lib\site-packages\attrs__init.py", line 3, in
from attr import (
ImportError: cannot import name 'NOTHING' from 'attr' (unknown location)

• ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
  referencing 0.36.2 requires attrs>=22.2.0, but you have attrs 21.2.0 which is incompatible.
  when trying to install mapsyncer and mapilio-kit, it runs into a conflict issue
  ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
  mapilio-kit 3.0.5 requires attrs==21.2.0, but you have attrs 25.3.0 which is incompatible.

Extra information (can contain screen shots)

[chrisdebian]

Hi,

The root cause here is a dependency conflict in mapilio-kit 3.0.5, which pinned attrs==21.2.0. Newer versions of jsonschema (and referencing) require attrs>=22.2.0, causing the import to fail.

This is fixed in mapilio-kit 3.0.6, which relaxes the constraint to attrs>=23.1.0. Upgrading should resolve the issue:

pip install --upgrade mapilio-kit

If you are using a virtualenv or a packaged install, you may need to reinstall into a clean environment.

It may also be worth pinning mapilio-kit>=3.0.6 in MapSyncer's own requirements.txt to prevent this recurring for users who install both packages into the same environment.

Thanks, Chris