ImportError: No module named _constants

[Dharani95-astro]

from contexts.ctx_mesa import OsContext
File "contexts/ctx_base.pyx", line 18, in init contexts.ctx_mesa
ImportError: No module named _constants

I am using python2.7 for being compatible with opendr installation. Installation was successful. But when I execute the command python demo.py --img_path data/coco1.png from the readme file. I encounter the above error. The same issue is encountered even with python 3.11

I have attached an image to show the folder structure inside my virtual environment that has _constants.py inside contexts

Ths image shows the error in renderer.py in opendr

The following shows my virtualenv
pip list

Package Version

---

absl-py 0.15.0
astor 0.8.1
backports.functools-lru-cache 1.6.6
backports.shutil-get-terminal-size 1.0.0
backports.weakref 1.0.post1
cachetools 3.1.1
certifi 2021.10.8
chardet 4.0.0
chumpy 0.70
cloudpickle 1.3.0
cycler 0.10.0
Cython 3.0.0
decorator 4.4.2
deepdish 0.3.7
enum34 1.1.10
funcsigs 1.0.2
functools32 3.2.3.post2
futures 3.4.0
gast 0.2.2
google-auth 1.35.0
google-auth-oauthlib 0.4.1
google-pasta 0.2.0
grpcio 1.41.1
h5py 2.10.0
idna 2.10
ipdb 0.13.13
ipython 5.10.0
ipython-genutils 0.2.0
Keras-Applications 1.0.8
Keras-Preprocessing 1.1.2
kiwisolver 1.1.0
Markdown 3.1.1
matplotlib 2.2.5
mock 3.0.5
networkx 2.2
numexpr 2.7.1
numpy 1.16.6
oauthlib 3.1.0
opencv-python 4.2.0.32
opendr 0.77
opt-einsum 2.3.2
pathlib 1.0.1
pathlib2 2.3.7.post1
pexpect 4.8.0
pickleshare 0.7.5
Pillow 6.2.2
pip 20.3.4
prompt-toolkit 1.0.18
protobuf 3.17.3
ptyprocess 0.7.0
pyasn1 0.5.0
pyasn1-modules 0.3.0
Pygments 2.5.2
pyparsing 2.4.7
python-dateutil 2.8.2
pytz 2023.3
PyWavelets 1.0.3
requests 2.27.1
requests-oauthlib 1.3.1
rsa 4.5
scandir 1.10.0
scikit-image 0.14.5
scipy 1.2.2
setuptools 44.1.1
simplegeneric 0.8.1
six 1.16.0
subprocess32 3.5.4
tables 3.5.2
tensorboard 2.1.0
tensorflow 2.1.0
tensorflow-estimator 2.1.0
termcolor 1.1.0
toml 0.10.2
traitlets 4.3.3
typing 3.10.0.0
urllib3 1.26.16
wcwidth 0.2.6
Werkzeug 1.0.1
wheel 0.37.1
wrapt 1.15.0

Could you please help me?

[DanLuoNEU]

Hi,

Here is the solution.
It works for me.