module 'ncempy' has no attribute 'io'

[w4m0330]

While (first time) using py4dstem, I encountered many problems from its dependencies including (llvmlite, numpy, matplotlib, etc.) all the problems were solved by downgrade to python to 3.6.12 and then reinstall the dependencies.

However, I finally encountered a problem originated in ncempy (which I could not identify the origin of problem and not too much resources on the internet): module 'ncempy' has no attribute 'io'

I tried pip uninstall ncempy and installed again, but not helpful. Therefore I'm posting here, dont know if its the right place to solve my problem.

(py4dstem) C:\WINDOWS\system32>py4dstem Traceback (most recent call last): File "c:\programdata\miniconda3\envs\py4dstem\lib\runpy.py", line 193, in _run_module_as_main "main", mod_spec) File "c:\programdata\miniconda3\envs\py4dstem\lib\runpy.py", line 85, in _run_code exec(code, run_globals) File "C:\ProgramData\Miniconda3\envs\py4dstem\Scripts\py4DSTEM.exe__main.py", line 4, in File "c:\programdata\miniconda3\envs\py4dstem\lib\site-packages\py4DSTEM\init.py", line 1, in from . import process File "c:\programdata\miniconda3\envs\py4dstem\lib\site-packages\py4DSTEM\process\init.py", line 3, in from . import preprocess File "c:\programdata\miniconda3\envs\py4dstem\lib\site-packages\py4DSTEM\process\preprocess\init.py", line 3, in from .electroncount import * File "c:\programdata\miniconda3\envs\py4dstem\lib\site-packages\py4DSTEM\process\preprocess\electroncount.py", line 11, in from ...io.datastructure import PointListArray File "c:\programdata\miniconda3\envs\py4dstem\lib\site-packages\py4DSTEM\io\init.py", line 3, in from . import nonnative File "c:\programdata\miniconda3\envs\py4dstem\lib\site-packages\py4DSTEM\io\nonnative\init.py", line 1, in from .read_dm import * File "c:\programdata\miniconda3\envs\py4dstem\lib\site-packages\py4DSTEM\io\nonnative\read_dm.py", line 5, in from ncempy.io import dm File "c:\programdata\miniconda3\envs\py4dstem\lib\site-packages\ncempy\io\init__.py", line 6, in from .read import read File "c:\programdata\miniconda3\envs\py4dstem\lib\site-packages\ncempy\io\read.py", line 1, in import ncempy.io as nio AttributeError: module 'ncempy' has no attribute 'io'

[ercius]

@w4m0330 Thanks for reporting this. The generalized read() functionality in ncempy was just released and there might be a problem with the imports. Im looking at this now to try and get a fix asap.

[ercius]

This issue only affects python 3.6 which is why it was not caught earlier. I have a fix ready (57e874cdd032ce3a51039b201469b1b4233891c1) which works in python 3.6 and 3.7. I will upload a bug fix version to pypi as 1.8.1. Then you can update to that version by pip install -U ncempy and py4dstem should work.

Ill have to check with the developers of py4dstem about the installation issue you had with >=python3.7. pip recently made versioning more strict and we must have conflicting versions in our setup.py files.

[w4m0330]

Hi Peter,

Thanks for the update! Awesome! I’ll try it soon and update you if it works out. The reason with installing python was due to llvmlite and its dependency Numba. I have to downgrade from 3.9 to 3.6/3.7 in order to install it...

Best, Mingjian

On Tue 12. Jan 2021 at 18:41, Peter Ercius notifications@github.com wrote:

This issue only affects python 3.6 which is why it was not caught earlier. I have a fix ready (57e874c https://github.com/ercius/openNCEM/commit/57e874cdd032ce3a51039b201469b1b4233891c1) which works in python 3.6 and 3.7. I will upload a bug fix version to pypi as 1.8.1. Then you can update to that version by pip install -U ncempy and py4dstem should work.

Ill have to check with the developers of py4dstem about the installation issue you had with >=python3.7. pip recently made versioning more strict and we must have conflicting versions in our setup.py files.

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/ercius/openNCEM/issues/29#issuecomment-758824058, or unsubscribe https://github.com/notifications/unsubscribe-auth/ADJFXLY36QWXMB75DCJCUZ3SZSCTZANCNFSM4V7FFEKQ .

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[ercius]

The fix is not live yet. I will take me a little more time to push 1.8.1 to pypi. Ill update here when its done.

I have also gotten everything to work with ncempy 1.8.0 in python 3.7. So, I would use that version for now. Ill test python3.8 and python3.9 installations soon.