libfmt error

[richardrl]

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
Cell In[6], line 1
----> 1 from projectaria_tools.core import data_provider, mps
      2 from projectaria_tools.core.mps.utils import (
      3     filter_points_from_confidence,
      4     get_gaze_vector_reprojection,
      5     get_nearest_eye_gaze,
      6     get_nearest_pose,
      7 )
      8 from projectaria_tools.core.stream_id import StreamId

File /samsung4tb/conda_envs/projectarea_tools_py311/lib/python3.11/site-packages/projectaria_tools/__init__.py:16
      1 # Copyright (c) Meta Platforms, Inc. and affiliates.
      2 #
      3 # Licensed under the Apache License, Version 2.0 (the "License");
   (...)
     14 
     15 # This makes the modules discoverable when doing dir(projectaria_tools)
---> 16 from . import core  # noqa

File /samsung4tb/conda_envs/projectarea_tools_py311/lib/python3.11/site-packages/projectaria_tools/core/__init__.py:21
      1 # Copyright (c) Meta Platforms, Inc. and affiliates.
      2 #
      3 # Licensed under the Apache License, Version 2.0 (the "License");
   (...)
     14 
     15 # This makes the modules discoverable when doing dir(projectaria_tools.core)
     17 """
     18 A pybind11 binding for projectaria_tools core module
     19 """
---> 21 from . import (  # noqa
     22     calibration,
     23     data_provider,
     24     image,
     25     mps,
     26     sensor_data,
     27     sophus,
     28     stream_id,
     29     vrs,
     30     vrs_health_check,
     31 )

File /samsung4tb/conda_envs/projectarea_tools_py311/lib/python3.11/site-packages/projectaria_tools/core/calibration.py:19
      1 # Copyright (c) Meta Platforms, Inc. and affiliates.
      2 #
      3 # Licensed under the Apache License, Version 2.0 (the "License");
   (...)
     12 # See the License for the specific language governing permissions and
     13 # limitations under the License.
     15 """
     16 A pybind11 binding for projectaria_tools calibration submodule.
     17 """
---> 19 from _core_pybinds.calibration import *  # noqa

ImportError: libfmt.so.9: cannot open shared object file: No such file or directory

[richardrl]

I think this issue is because I tried to install projectaria_tools inside a micromamba environment, and for some reason the pybind inside that environment is not looking for the .so files inside the environment.

[richardrl]

I was originally using the mps_quickstart.ipynb notebook and no matter what I did with LD_LIBRARY_PATH, it wouldn't load.

export LD_LIBRARY_PATH=/samsung4tb/conda_envs/projectarea_tools_py311/lib
$ python3
Python 3.11.9 | packaged by conda-forge | (main, Apr 19 2024, 18:36:13) [GCC 12.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

import projectaria_tools

However it worked in command line

[SeaOtocinclus]

If you use Jupyter Notebook, be sure to use the one of your Python environments, else it will not work (since it will load different path, and so load a different python env)

See https://facebookresearch.github.io/projectaria_tools/docs/data_utilities/installation/troubleshooting#python-module-import-error

I.e When using Pixi (a package manager) you can load the notebook from the environment as

# activate the env
pixi shell
# Run Jupyter (from the env) and open the notebook (pixi, use a direct path to ensure jupyter will take the right python path)
.pixi/envs/default/bin/jupyter notebook

[richardrl]

Hi, thanks the tip. I was using the micromamba enviroment as my kernel inside the Jupyer notebook - is that what you mean? The error happened even though I did this.

[SeaOtocinclus]

What I meant is did you run Jupyter Notebook from your python environment?
So let's summarize what you have encountered.

• everything works if you use a classic python environment
• you have the issue with libfmt only if you use micromamba

Am I right?

• We got some project using projectaria_tools and using mamba (ATEK and we never saw this error before.

Wonder what the underlying issue is...

[richardrl]

@SeaOtocinclus Thanks for your hint. Yes, previously it seems I did not start the jupyter notebook from the right python env. I did now - it doesn't work by default - but after using the LD_LIBRARY_PATH export above it also works in Jupyter Notebook.