ModuleNotFoundError: No module named 'arch' when importing arch_model about arch

[alfarocesar]

Installed libraries in the virtual environment:

Package Version

---

arch 6.1.1.dev7+g6bf7e77
numpy 1.25.0
packaging 23.1
pandas 2.0.3
patsy 0.5.3
pip 23.1.2
python-dateutil 2.8.2
pytz 2023.3
scipy 1.11.1
setuptools 67.8.0
six 1.16.0
statsmodels 0.14.0
tzdata 2023.3
var 2023.6.2
wheel 0.38.4

[bashtage]

What command did you use to install arch?

[alfarocesar]

Thank you for your response. I have tried multiple commands, including:

pip install arch
pip install git+https://github.com/bashtage/arch.git
pip install --force-reinstall statsmodels arch
pip install statsmodels arch

Despite these installation attempts, I am still encountering the 'ModuleNotFoundError' when trying to import the 'arch' library.

[bashtage]

Have you tried installing arch==6.0.0 to see if it version specific. I would also use commands like

python -m pip install arch==6.0
python -m IPython

Just to make sure you are using the right python.

[alfarocesar]

Hello,
it didn´t work,
Currently, these are the installed libraries in my virtual environment:
appnope 0.1.3
arch 6.0.0
asttokens 2.2.1
backcall 0.2.0
decorator 5.1.1
executing 1.2.0
ipython 8.14.0
jedi 0.18.2
matplotlib-inline 0.1.6
numpy 1.25.0
packaging 23.1
pandas 2.0.3
parso 0.8.3
patsy 0.5.3
pexpect 4.8.0
pickleshare 0.7.5
pip 23.1.2
prompt-toolkit 3.0.38
ptyprocess 0.7.0
pure-eval 0.2.2
Pygments 2.15.1
python-dateutil 2.8.2
pytz 2023.3
scipy 1.11.1
setuptools 67.8.0
six 1.16.0
stack-data 0.6.2
statsmodels 0.14.0
traitlets 5.9.0
tzdata 2023.3
var 2023.6.2
wcwidth 0.2.6
wheel 0.38.4

[bashtage]

Have you resolved this? I can't reproduce it. I did

conda create -n arch-test python=3.11 ipython -y
conda activate arch-test
python -m pip install arch
python -m IPython

and then ran

from arch import arch_model

which worked as expected.

[bashtage]

Since I can't reproduce in a fresh environment, I'm going to close. Please continue to post if you are having problems.