caper install

[yinshiyi]

Caper run fine on python 3.8.5

Does anyone know what the possible errors can be? error on python 3.9.5 and Python 2.7.16 :: Anaconda, Inc.
Thank you

Traceback (most recent call last):
File "/home/shiyi/.local/bin/caper", line 3, in
from caper.cli import main
File "/home/shiyi/.local/lib/python3.9/site-packages/caper/cli.py", line 13, in
from .caper_args import ResourceAnalysisReductionMethod, get_parser_and_defaults
File "/home/shiyi/.local/lib/python3.9/site-packages/caper/caper_args.py", line 25, in
from .resource_analysis import ResourceAnalysis
File "/home/shiyi/.local/lib/python3.9/site-packages/caper/resource_analysis.py", line 10, in
from sklearn import linear_model
File "/home/shiyi/.local/lib/python3.9/site-packages/sklearn/init.py", line 82, in
from .base import clone
File "/home/shiyi/.local/lib/python3.9/site-packages/sklearn/base.py", line 17, in
from .utils import _IS_32BIT
File "/home/shiyi/.local/lib/python3.9/site-packages/sklearn/utils/init.py", line 20, in
from scipy.sparse import issparse
File "/home/shiyi/.local/lib/python3.9/site-packages/scipy/init.py", line 153, in
from scipy._lib._ccallback import LowLevelCallable
File "/home/shiyi/.local/lib/python3.9/site-packages/scipy/_lib/_ccallback.py", line 1, in
from . import _ccallback_c
File "_ccallback_c.pyx", line 210, in init scipy._lib._ccallback_c
File "/usr/local/lib/python3.9/ctypes/init.py", line 8, in
from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named '_ctypes'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/shiyi/.local/bin/caper", line 10, in
from caper.cli import main
File "/home/shiyi/.local/lib/python3.9/site-packages/caper/cli.py", line 13, in
from .caper_args import ResourceAnalysisReductionMethod, get_parser_and_defaults
File "/home/shiyi/.local/lib/python3.9/site-packages/caper/caper_args.py", line 25, in
from .resource_analysis import ResourceAnalysis
File "/home/shiyi/.local/lib/python3.9/site-packages/caper/resource_analysis.py", line 10, in
from sklearn import linear_model
File "/home/shiyi/.local/lib/python3.9/site-packages/sklearn/init.py", line 82, in
from .base import clone
File "/home/shiyi/.local/lib/python3.9/site-packages/sklearn/base.py", line 17, in
from .utils import _IS_32BIT
File "/home/shiyi/.local/lib/python3.9/site-packages/sklearn/utils/init.py", line 20, in
from scipy.sparse import issparse
File "/home/shiyi/.local/lib/python3.9/site-packages/scipy/init.py", line 153, in
from scipy._lib._ccallback import LowLevelCallable
File "/home/shiyi/.local/lib/python3.9/site-packages/scipy/_lib/_ccallback.py", line 1, in
from . import _ccallback_c
File "_ccallback_c.pyx", line 210, in init scipy._lib._ccallback_c
File "/usr/local/lib/python3.9/ctypes/init.py", line 8, in
from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named '_ctypes'