Errors when using pydart2- ImportError: cannot import name 'pydart2_api' from partially initialized module 'pydart2'

Hi,

I have an issue when installing the pydart2.
the environment is Ubuntu 20. python3
My process for the installation is:

1, Install dartpy from Source
2, install pydart2 with “Install with pip”

then in the terminal, I run:

@risa:~$ python3
Python 3.8.10 (default, Jun 2 2021, 10:49:15)
[GCC 9.4.0] on linux
Type “help”, “copyright”, “credits” or “license” for more information.

import pydart2 as pydart
Traceback (most recent call last):
File “”, line 1, in
File “/usr/local/lib/python3.8/dist-packages/pydart2/init.py”, line 5, in
from . import pydart2_api as papi
ImportError: cannot import name ‘pydart2_api’ from partially initialized module ‘pydart2’ (most likely due to a circular import) (/usr/local/lib/python3.8/dist-packages/pydart2/init.py)


the error is :
ImportError: cannot import name ‘pydart2_api’ from partially initialized module ‘pydart2’ (most likely due to a circular import) (/usr/local/lib/python3.8/dist-packages/pydart2/init.py)


I also try to install the pydart2 in the other way: Install from source code, the installation looks fine with no errors,
then I run the example code " * [Cubes: Hello, PyDART!]"
then the same error comes again:
"Traceback (most recent call last):
File “helloPydart2.py”, line 1, in
import pydart2 as pydart
File “/usr/local/lib/python3.8/dist-packages/pydart2/init.py”, line 5, in
from . import pydart2_api as papi
ImportError: cannot import name ‘pydart2_api’ from partially initialized module ‘pydart2’ (most likely due to a circular import) (/usr/local/lib/python3.8/dist-packages/pydart2/init.py)
"
Does anyone know how to fix this?

thank you in advance!