installation issue : ImportError: libGL.so.1: cannot open shared object file: No such file or directory

[nitschkematthew]

Hello! I am having a go at getting PyMeshLab installed on Windows Subsystem for Linux

python3 -m pip install git+https://github.com/cnr-isti-vclab/PyMeshLab
Collecting git+https://github.com/cnr-isti-vclab/PyMeshLab
  Cloning https://github.com/cnr-isti-vclab/PyMeshLab to /tmp/pip-req-build-0rtmh9ms
Requirement already satisfied: numpy in ./miniconda3/lib/python3.7/site-packages (from pymeshlab==0.1.7) (1.19.5)
Building wheels for collected packages: pymeshlab
  Building wheel for pymeshlab (setup.py) ... done
  Created wheel for pymeshlab: filename=pymeshlab-0.1.7-cp37-cp37m-manylinux1_x86_64.whl size=42164894 sha256=57b54d26ae2d71d39f8e11f7354b5ef47a2bed3a73bb900e816a0ec4a65483f2
  Stored in directory: /tmp/pip-ephem-wheel-cache-hwq1h23n/wheels/3d/56/5b/3748b9bd933db981a8d029588cc6efdd11ed37fb00906abf6b
Successfully built pymeshlab
Installing collected packages: pymeshlab
Successfully installed pymeshlab-0.1.7

Everything seems to install fine - however when I try to load the module I get the following error:

python3
>>> import pymeshlab as ml
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/matt/miniconda3/lib/python3.7/site-packages/pymeshlab/__init__.py", line 1, in <module>
    from .pmeshlab import *
ImportError: libGL.so.1: cannot open shared object file: No such file or directory

and here is a test example of the errors using pytest

pytest --pyargs pymeshlab
=============================================================================================== test session starts ===============================================================================================
platform linux -- Python 3.7.3, pytest-6.2.1, py-1.10.0, pluggy-0.13.1
rootdir: /home/matt
collected 0 items / 18 errors

===================================================================================================== ERRORS ======================================================================================================
___________________________________________________ ERROR collecting miniconda3/lib/python3.7/site-packages/pymeshlab/tests/test_colorize_geodesic_distance.py ____________________________________________________
ImportError while importing test module '/home/matt/miniconda3/lib/python3.7/site-packages/pymeshlab/tests/test_colorize_geodesic_distance.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
miniconda3/lib/python3.7/importlib/__init__.py:127: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
miniconda3/lib/python3.7/site-packages/pymeshlab/__init__.py:1: in <module>
    from .pmeshlab import *
E   ImportError: libGL.so.1: cannot open shared object file: No such file or directory

Do you have any suggestions for how I can get this running?

Thanks!

[ghost]

Based on the error message, it looks like you are missing the graphics library libGL.

If you're on Ubuntu, you can get it with apt update && apt install --yes libgl1-mesa-dev

It's a dependency the developers are aware of, see the discussion here

[nitschkematthew]

Able to import pymeshlab and all pytests pass after installation of libGL.

Thank you!

[bryanbocao]

I fixed it by

sudo apt-get install python3-opencv