Syntaxis error in widgets.py:

[juanbolso]

Hi,

I am having troubles trying to use the ipyvolume library.
I have installed it using conda and defining a conda environment.
At first I tried to use it in VSCode but some problem with the widgets prevented ipyvolume to show the 3d interactive plot properly.
Anyway, I went to the safer jupyter lab way ran in a browser (in this case Chrome Version 115.0.5790.110):

This is my jupyter version (and sub-versions):
IPython : 8.14.0
ipykernel : 5.5.5
ipywidgets : 8.0.7
jupyter_client : 8.3.0
jupyter_core : 5.3.1
jupyter_server : 2.7.0
jupyterlab : 4.0.3
nbclient : 0.8.0
nbconvert : 7.7.3
nbformat : 5.9.1
notebook : 7.0.0
qtconsole : not installed
traitlets : 5.9.0

And this is my python version (also installed in the conda environment I called jupyterEnv):
python 3.9.2

Conda version:
conda 23.7.2

Here is the error that jupyter lab gives when trying to import ipyvolume library:

Traceback (most recent call last):

File ~/Desktop/CondaEnv/miniconda3/envs/jupyterEnv/lib/python3.9/site-packages/IPython/core/interactiveshell.py:3508 in run_code
exec(code_obj, self.user_global_ns, self.user_ns)

Cell In[1], line 16
from ipyvolume import *

File ~/Desktop/CondaEnv/miniconda3/envs/jupyterEnv/lib/python3.9/site-packages/ipyvolume/init.py:8
from ipyvolume.widgets import * # noqa: F401, F403

File ~/Desktop/CondaEnv/miniconda3/envs/jupyterEnv/lib/python3.9/site-packages/ipyvolume/widgets.py:157
return pythreejs.ShaderMatshow_max = traitlets.CFloat(1).tag(sync=True)ew').tag(sync=True)
^
SyntaxError: invalid syntax

Finally, I want to say that some time ago I used this library also in Ubuntu, and it worked perfectly at that moment.
Something is off here :( In some of my attempts to fix this (trying in another environment to (un)-install other packages, use other pyhton version, etc) sometimes I got this error: AttributeError: module 'ipyvolume' has no attribute '_version'.

I would really appreciate any help with this issue!

Regards, Juan.

[juanbolso]

Hi again,

I have installed all from scratch because I found that the widgets.py file I had in my pc was (for some strange reason) different from the widgets.py file in the master branch of the ipyvolume repo.

Now I have a different error which may be due to a circular import (according to the error message):

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
[/home/jpons/Desktop/CondaEnv/CODIGOS/Hamiltoniano/Hasigma_planetario/MODULAR/planetHsurface_withIntegration.ipynb](https://file+.vscode-resource.vscode-cdn.net/home/jpons/Desktop/CondaEnv/CODIGOS/Hamiltoniano/Hasigma_planetario/MODULAR/planetHsurface_withIntegration.ipynb) Cell 2 line 1
     [14](vscode-notebook-cell:/home/jpons/Desktop/CondaEnv/CODIGOS/Hamiltoniano/Hasigma_planetario/MODULAR/planetHsurface_withIntegration.ipynb#W1sZmlsZQ%3D%3D?line=13) from IPython.display import display
     [15](vscode-notebook-cell:/home/jpons/Desktop/CondaEnv/CODIGOS/Hamiltoniano/Hasigma_planetario/MODULAR/planetHsurface_withIntegration.ipynb#W1sZmlsZQ%3D%3D?line=14) from ipywidgets import VBox
---> [16](vscode-notebook-cell:/home/jpons/Desktop/CondaEnv/CODIGOS/Hamiltoniano/Hasigma_planetario/MODULAR/planetHsurface_withIntegration.ipynb#W1sZmlsZQ%3D%3D?line=15) from ipyvolume import *
     [17](vscode-notebook-cell:/home/jpons/Desktop/CondaEnv/CODIGOS/Hamiltoniano/Hasigma_planetario/MODULAR/planetHsurface_withIntegration.ipynb#W1sZmlsZQ%3D%3D?line=16) import ipyvolume as ipv # https://ipyvolume.readthedocs.io/en/latest/install.html
     [18](vscode-notebook-cell:/home/jpons/Desktop/CondaEnv/CODIGOS/Hamiltoniano/Hasigma_planetario/MODULAR/planetHsurface_withIntegration.ipynb#W1sZmlsZQ%3D%3D?line=17) from matplotlib import cm

File [~/Desktop/CondaEnv/miniconda3/envs/astroEnv/lib/python3.11/site-packages/ipyvolume/__init__.py:8](https://file+.vscode-resource.vscode-cdn.net/home/jpons/Desktop/CondaEnv/CODIGOS/Hamiltoniano/Hasigma_planetario/MODULAR/~/Desktop/CondaEnv/miniconda3/envs/astroEnv/lib/python3.11/site-packages/ipyvolume/__init__.py:8)
      6 from ipyvolume import datasets  # noqa: F401
      7 from ipyvolume import embed  # noqa: F401
----> 8 from ipyvolume.widgets import *  # noqa: F401, F403
      9 from ipyvolume.transferfunction import *  # noqa: F401, F403
     10 from ipyvolume.pylab import *  # noqa: F401, F403

File [~/Desktop/CondaEnv/miniconda3/envs/astroEnv/lib/python3.11/site-packages/ipyvolume/widgets.py:30](https://file+.vscode-resource.vscode-cdn.net/home/jpons/Desktop/CondaEnv/CODIGOS/Hamiltoniano/Hasigma_planetario/MODULAR/~/Desktop/CondaEnv/miniconda3/envs/astroEnv/lib/python3.11/site-packages/ipyvolume/widgets.py:30)
     22 from ipyvolume.traittypes import Image
     23 from ipyvolume.serialize import (
     24     array_cube_tile_serialization,
     25     array_serialization,
   (...)
     28     texture_serialization,
     29 )
---> 30 from ipyvolume.transferfunction import TransferFunction
...
     22 @widgets.register
     23 class TransferFunction(widgets.DOMWidget):
     24     _model_name = Unicode('TransferFunctionModel').tag(sync=True)

AttributeError: partially initialized module 'ipyvolume' has no attribute '_version' (most likely due to a circular import)

[juanbolso]

Well, I don't know why but after re-installing everything and re-booting VSCode, it's working :D

Here is the plot I am generating:

However, I am having troubles to do almost anything with this interactive 3D plot. For example, I cannot change the resolution neither I can't save a capture of it because the following popup appears:

If I press OK then another message (from VSCode) appears:

and if I press cancel, then goes back to the 3D plot but without any intended changes having effect.