Importing pybgs crashes python runtime

[jnissin]

Describe the bug

I have attempted to install pybgs both via pip:

pip install pybgs --force-reinstall --no-cache-dir

and from sources after cloning the repository via setup.py:

python setup.py build
python setup.py install

within a conda environment. In both cases I manage to install the library but when I attempt to import it the python runtime crashes:

$ python                                            
Python 3.8.12 | packaged by conda-forge | (default, Oct 12 2021, 21:50:56) 
[Clang 11.1.0 ] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pybgs
Fatal Python error: _PyInterpreterState_Get(): no current thread state
Python runtime state: unknown

[1]    79583 abort      python

To Reproduce

Install the library, either via pip or setup.py, and attempt to import it via import pybgs.

Expected behavior

The library is expected to import without crashing the python runtime.

System information

Desktop (please complete the following information):

• OS: macOS 11.6
• Python version: 3.8.12
• OpenCV version: 3.4.7
• conda version: 4.10.3

Additional context

Building the library with CMake and running the example run_video.sh is successful. I have tried multiple different python versions, but the result is always the same.

Installed packages

# Name                    Version                   Build  Channel
bzip2                     1.0.8                h0d85af4_4    conda-forge
c-ares                    1.17.2               h0d85af4_0    conda-forge
ca-certificates           2021.10.8            h033912b_0    conda-forge
cairo                     1.16.0            he43a7df_1008    conda-forge
certifi                   2021.10.8        py38h50d1736_0    conda-forge
cmake                     3.19.6               h04fa861_0  
cycler                    0.10.0                     py_2    conda-forge
expat                     2.4.1                he49afe7_0    conda-forge
ffmpeg                    4.1.3                h5c2b479_0    conda-forge
fontconfig                2.13.1            h10f422b_1005    conda-forge
freetype                  2.10.4               h4cff582_1    conda-forge
gettext                   0.19.8.1          hd1a6beb_1008    conda-forge
giflib                    5.2.1                hbcb3906_2    conda-forge
gmp                       6.2.1                h2e338ed_0    conda-forge
gnutls                    3.6.13               h756fd2b_1    conda-forge
graphite2                 1.3.13            h2e338ed_1001    conda-forge
harfbuzz                  2.9.1                h159f659_1    conda-forge
hdf5                      1.10.5          nompi_h500d6d3_1114    conda-forge
icu                       68.1                 h74dc148_0    conda-forge
imutils                   0.5.4            py38h50d1736_0    conda-forge
jasper                    1.900.1           h636a363_1006    conda-forge
jpeg                      9d                   hbcb3906_0    conda-forge
kiwisolver                1.3.2            py38h12bbefe_0    conda-forge
krb5                      1.19.2               h289aae4_2    conda-forge
lame                      3.100             h35c211d_1001    conda-forge
lcms2                     2.11                 h11f7e16_1    conda-forge
libblas                   3.9.0           12_osx64_openblas    conda-forge
libcblas                  3.9.0           12_osx64_openblas    conda-forge
libcurl                   7.79.1               h97da3c1_1    conda-forge
libcxx                    12.0.1               habf9029_0    conda-forge
libedit                   3.1.20191231         h0678c8f_2    conda-forge
libev                     4.33                 haf1e3a3_1    conda-forge
libffi                    3.4.2                he49afe7_4    conda-forge
libgfortran               5.0.0           9_3_0_h6c81a4c_23    conda-forge
libgfortran5              9.3.0               h6c81a4c_23    conda-forge
libglib                   2.70.0               hf1fb8c0_1    conda-forge
libiconv                  1.16                 haf1e3a3_0    conda-forge
liblapack                 3.9.0           12_osx64_openblas    conda-forge
liblapacke                3.9.0           12_osx64_openblas    conda-forge
libnghttp2                1.43.0               hfd382f3_1    conda-forge
libopenblas               0.3.18          openmp_h3351f45_0    conda-forge
libopencv                 3.4.7                    py38_9    conda-forge
libpng                    1.6.37               h7cec526_2    conda-forge
libssh2                   1.10.0               hd3787cc_2    conda-forge
libtiff                   4.1.0                ha78913b_3    conda-forge
libuv                     1.42.0               h0d85af4_0    conda-forge
libwebp                   1.0.2                hd3bf737_5    conda-forge
libxml2                   2.9.12               h93ec3fd_0    conda-forge
libzlib                   1.2.11            h9173be1_1013    conda-forge
llvm-openmp               12.0.1               hda6cdc1_1    conda-forge
lz4-c                     1.9.3                he49afe7_1    conda-forge
matplotlib-base           3.4.3            py38hc7d2367_1    conda-forge
ncurses                   6.2                  h2e338ed_4    conda-forge
nettle                    3.6                  hedd7734_0    conda-forge
numpy                     1.21.3           py38h49b9922_0    conda-forge
olefile                   0.46               pyh9f0ad1d_1    conda-forge
opencv                    3.4.7                    py38_9    conda-forge
openh264                  1.8.0             hd9629dc_1000    conda-forge
openssl                   3.0.0                h0d85af4_1    conda-forge
pcre                      8.45                 he49afe7_0    conda-forge
pillow                    8.1.0            py38hc1d52f7_1    conda-forge
pip                       21.2.4           py38hecd8cb5_0  
pixman                    0.40.0               hbcb3906_0    conda-forge
py-opencv                 3.4.7            py38h5ca1d4c_9    conda-forge
pybgs                     3.0.0.post2              pypi_0    pypi
pyparsing                 2.4.7              pyh9f0ad1d_0    conda-forge
python                    3.8.12          h43ca1e7_2_cpython    conda-forge
python-dateutil           2.8.2              pyhd8ed1ab_0    conda-forge
python_abi                3.8                      2_cp38    conda-forge
readline                  8.1                  h05e3726_0    conda-forge
rhash                     1.4.1                h35c211d_0    conda-forge
scipy                     1.7.1            py38hd329d04_0    conda-forge
setuptools                58.2.0           py38h50d1736_0    conda-forge
six                       1.16.0             pyh6c4a22f_0    conda-forge
sqlite                    3.36.0               h23a322b_2    conda-forge
tk                        8.6.11               h5dbffcc_1    conda-forge
tornado                   6.1              py38h96a0964_1    conda-forge
wheel                     0.37.0             pyhd8ed1ab_1    conda-forge
x264                      1!152.20180806       h1de35cc_0    conda-forge
xz                        5.2.5                haf1e3a3_1    conda-forge
zlib                      1.2.11            h9173be1_1013    conda-forge
zstd                      1.4.9                h582d3a0_0    conda-forge

[andrewssobral]

Hello @jnissin ,
Sorry for my absence, I had to put the bgslibrary in standby for a long time.
I will try to reproduce your issue in my local environment.
I come back to you soon as possible,
Thanks
Andrews

[xavibou]

Hi,
Is there any update on this? I installed pybgs on opencv 3.4.7 using pip and I am getting the same error at importing the library.

Thanks
Xavi

[andrewssobral]

Hello @jnissin @xavibou , sorry for my delayed feedback.
I just released a new version of the BGSLibrary, now v3.1.0.
I tested it on Windows, Mac and Linux, both compiling the C++ library on OpenCV 3.4.7, 3.4.16 and 4.6.0.
I also tested its respective Python wrapper and GT user interface.
Everything is working for me, could you please check in your side if this new version fix your issues?
Thanks in advance,
Andrews