STLIB plugin not working

[louisdehaybe]

Hi !

I installed SOFA V21.12 from the binaries available on the main page of SOFA. I can run examples of SOFA scenes available in share/examples/Components/ and python scenes available in /SofaPython3/share/examples/ .

I then downloaded the binaries for STLIB from https://github.com/SofaDefrost/STLIB/releases (STLIB_v21.12_for-SOFA-v21.12_Linux.zip)
and those of SoftRobots from here https://github.com/SofaDefrost/SoftRobots/releases (SoftRobots_v21.12_for-SOFA-v21.12_Linux.zip).
I put those files in the "plugin" folder and then activated them via the plugin manager.

However, I am unable to run Soft Robots scenes.
For instance, in plugins/SoftRobots/docs/tutorials/Tripod/details if I try to run s90servo.py I get the error:

Python exception:
Exception: SPLIB is now relocated at: https://github.com/SofaDefrost/STLIB, please clone and install the plugin to use it

Or if I try "tutorial.py":

Unable to completely load the scene from file 'tutorial.py'.
Python exception:
ModuleNotFoundError: No module named 'stlib'

although STLIB is well activated in the plugin manager.

For "tripod.py", I get:

Unable to completely load the scene from file 'tripod.py'.
Python exception:
Exception: SPLIB is now relocated at: https://github.com/SofaDefrost/STLIB, please clone and install the plugin to use it

At:
/home/louis/Documents/SofaBinaries/SOFA/plugins/SofaPython3/lib/python3/site-packages/splib/init.py(2):
(219): _call_with_frames_removed
(848): exec_module
(686): _load_unlocked
(975): _find_and_load_unlocked
(991): _find_and_load
(219): _call_with_frames_removed
(961): _find_and_load_unlocked
(991): _find_and_load
tripod.py(1):
(219): _call_with_frames_removed
(848): exec_module
(686): _load_unlocked
(702): _load
/usr/lib/python3.8/imp.py(171): load_source
/usr/lib/python3.8/imp.py(234): load_module
(3):

Could you please help me to solve it ?

@EulalieCoevoet , I was advised by @hugtalbot to add you to this discussion.

Thanks a lot

[EulalieCoevoet]

Hi @louisdehaybe,

If you're using the SofaPython3 plugin, you should only run the examples/tutorials under the repositories named sofapython3.
For instance: plugins/SoftRobots/docs/tutorials/Tripod/details/sofapython3/

Now, still, you will probably need a new release of STLIB to make everything work. It should come in the coming days, I'll keep you updated.

I suggest you to wait, but if you can't, the all-included binaries 21-06 available here should allow you to try the tutorials.

Hope this helps.

[EulalieCoevoet]

The master release of STLIB has been udpated and should allow you to try the tutorials with your current install of SOFA (V21.12) 🤞

[louisdehaybe]

Hey @EulalieCoevoet ,

Thanks for the help!
However, it still does not work unfortunately.
When I am in plugins/SoftRobots/docs/tutorials/Tripod/details/sofapython3/ , if I do "runSofa tutorial.py", I still have

Unable to completely load the scene from file 'tutorial.py'.  
Python exception:   
  ModuleNotFoundError: No module named 'stlib3'

At:
  tutorial.py(2): <module>
  <frozen importlib._bootstrap>(219): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(848): exec_module
  <frozen importlib._bootstrap>(686): _load_unlocked
  <frozen importlib._bootstrap>(702): _load
  /usr/lib/python3.8/imp.py(171): load_source
  /usr/lib/python3.8/imp.py(234): load_module
  <string>(3): <module>

With tripod.py, it still has problems with splib3:

Unable to completely load the scene from file 'tripod.py'.  
Python exception:   
  ModuleNotFoundError: No module named 'splib3'

At:
  tripod.py(3): <module>
  <frozen importlib._bootstrap>(219): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(848): exec_module
  <frozen importlib._bootstrap>(686): _load_unlocked
  <frozen importlib._bootstrap>(702): _load
  /usr/lib/python3.8/imp.py(171): load_source
  /usr/lib/python3.8/imp.py(234): load_module
  <string>(3): <module>

[EulalieCoevoet]

This is because STLIB is not in your PYTHONPATH. We would like this to be automatic... but for now you can see my comment here.

[hugtalbot]

any update @louisdehaybe ?

[bmauze]

Hi @EulalieCoevoet,

I have a similar problem but not with the splib3 nor the stlib3 module but with the function inside. I tried to use the object fixedbox but I get the following error:

Python exception:   
  ModuleNotFoundError: No module named 'fixedbox'

At:
  /home/olivier/sofa/build/lib/python3/site-packages/stlib3/physics/constraints/__init__.py(28): <module>
  <frozen importlib._bootstrap>(219): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(848): exec_module
  <frozen importlib._bootstrap>(686): _load_unlocked
  <frozen importlib._bootstrap>(975): _find_and_load_unlocked
  <frozen importlib._bootstrap>(991): _find_and_load
  rigidRespForumDamien.py(5): <module>
  <frozen importlib._bootstrap>(219): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(848): exec_module
  <frozen importlib._bootstrap>(686): _load_unlocked
  <frozen importlib._bootstrap>(702): _load
  /usr/lib/python3.8/imp.py(171): load_source
  /usr/lib/python3.8/imp.py(234): load_module
  <string>(3): <module>

I get a similar error using the firststep tutorial from the folder python3

[ERROR]   [SofaPython3::SceneLoader] Unable to completely load the scene from file '/home/olivier/sofa/ext_plugin_repo/SoftRobots_v21_12/docs/tutorials/FirstSteps/details/sofapython3/step1.py3scn'.  
Python exception:   
  ImportError: cannot import name 'Floor' from 'stlib3.physics.rigid' (/home/olivier/sofa/build/lib/python3/site-packages/stlib3/physics/rigid/__init__.py)

At:
  step1.py3scn(4): <module>
  <frozen importlib._bootstrap>(219): _call_with_frames_removed
  <frozen importlib._bootstrap_external>(848): exec_module
  <frozen importlib._bootstrap>(686): _load_unlocked
  <frozen importlib._bootstrap>(702): _load
  /usr/lib/python3.8/imp.py(171): load_source
  /usr/lib/python3.8/imp.py(234): load_module
  <string>(3): <module>

The plugin seems to be loaded from the plugin manager and my PYTHONPATH is the following:

echo $PYTHONPATH
/home/sofa/build/lib/python3/site-packages:/home/sofa/build/lib/python3/site-packages/stlib3:/home/sofa/build/lib/python3/site-packages/splib3

during the CMake configuration and generation, I had the following warning but no error:

CMake Warning at /home/olivier/sofa/src/SofaKernel/modules/Sofa.Config/cmake/SofaMacrosPython.cmake:17 (message):
  sofa_set_python_directory is deprecated.  Use sofa_install_pythonscripts
  instead.
Call Stack (most recent call first):
  /home/olivier/sofa/ext_plugin_repo/BeamAdapter_v21_12/CMakeLists.txt:159 (sofa_set_python_directory)

Adding plugin STLIB

One "strange" point is the fact that this plugin is the only one whom the .so is not in the same directory than the others.

Do you have any idea from where the error could come from ?
I am currently trying to use SOFA_v21v12 with the release of the STLIB plugin 21_12 on ubuntu with python 3.8.10.

Thanks in advance,
Benjamin

[EulalieCoevoet]

Hi @bmauze,

These have been fixed already. I have a compiled version (master branches) and it's all working. What you can do is either:

• checkout the master branches (SOFA, SoftRobots, STLIB...) and compile
• use the latest all-included binaries from here
• or, since your problem comes from python scripts only, it may work to just replace manually the files; SoftRobots/docs, and STLIB.

[bmauze]

Hi @EulalieCoevoet,

Thank you so much for this information. With the current master branches everything is working well.

Best regards,
Benjamin