Cannot import _sensor issue

[srivatsankp]

Summary
I have just installed Pychrono for vehicle simulation and am interested in sensor simualtion as well. I am able to run the demo files in relation to simulation pretty well, without the _core issue (like #471). When I try to run the sensor demos, I get the following traceback:
(base) PS C:\Users\spullabhotla6\AppData\Local\anaconda3\envs\pychrono\Lib\site-packages\pychrono\demos> C:/Users/spullabhotla6/AppData/Local/anaconda3/Scripts/activate (base) PS C:\Users\spullabhotla6\AppData\Local\anaconda3\envs\pychrono\Lib\site-packages\pychrono\demos> conda activate pychrono (pychrono) PS C:\Users\spullabhotla6\AppData\Local\anaconda3\envs\pychrono\Lib\site-packages\pychrono\demos> & C:/Users/spullabhotla6/AppData/Local/anaconda3/envs/pychrono/python.exe c:/Users/spullabhotla6/AppData/Local/anaconda3/envs/pychrono/Lib/site-packages/pychrono/demos/sensor/demo_SEN_radar.py Traceback (most recent call last): File "c:\Users\spullabhotla6\AppData\Local\anaconda3\envs\pychrono\Lib\site-packages\pychrono\demos\sensor\demo_SEN_radar.py", line 14, in <module> import pychrono.sensor as sens File "C:\Users\spullabhotla6\AppData\Local\anaconda3\envs\pychrono\lib\site-packages\pychrono\sensor.py", line 13, in <module> from . import _sensor ImportError: cannot import name '_sensor' from 'pychrono' (C:\Users\spullabhotla6\AppData\Local\anaconda3\envs\pychrono\lib\site-packages\pychrono\__init__.py)

Chrono Version and Platform
Chrono Version : pychrono-9.0.0-py310_4852.tar
Python Version : 3.10.15
Platform : Windows

One difference from the official installation documentation is that pythonocc-core 7.4.1 was incompatible with 3.10.15, so I installed 7.9.0. Is that bound to cause this issue? Thanks! I have also not installed gnuplot as that isn't supported on windows. I don't see how that should cause an issue though.

[uebian]

Thank you for raising the issue. Our conda package building pipeline has recently changed and we haven't updated the document. We have simplified the installation process so you won't need to manually download and install packages as before. Could you please try using the following two command in the NEW environment to install PyChrono through conda? Thank you very much!

conda create -n chrono_test python=3.12 -c conda-forge
conda install pychrono -c projectchrono -c dlr-sc -c conda-forge

[srivatsankp]

The imports work now but the new demo files seem broken. Do the demo files need to be updated as well? I get the following error when I run demo_sen_HMMWV.py

Cannot use default video driver - fall back to OpenGL
Traceback (most recent call last):
  File "c:\Users\spullabhotla6\chrono\demos\sensor\demo_SEN_HMMWV.py", line 374, in <module>
    main()
  File "c:\Users\spullabhotla6\chrono\demos\sensor\demo_SEN_HMMWV.py", line 106, in main
    driver = veh.ChInteractiveDriverIRR(vis)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'pychrono.vehicle' has no attribute 'ChInteractiveDriverIRR'. Did you mean: 'ChInteractiveDriver'?

[rserban]

@srivatsankp - we failed to update some Python demos to reflect the latest Chrono API. We'll take care of this soon and let you know here when done. Please let us know if you find more demos with similar issues.