Скачать или смотреть python pandas pip install pandas still get error, ImportError No module named pandas

(name_of_my_env) demo@ubuntu:~/SelfStudy/python/python2/python2/SHAP$ pip install pandas
Collecting pandas
Downloading pandas-1.2.0-cp39-cp39-manylinux1_x86_64.whl (9.7 MB)
|████████████████████████████████| 9.7 MB 119 kB/s
Collecting numpy=1.16.5
Downloading numpy-1.19.5-cp39-cp39-manylinux2010_x86_64.whl (14.9 MB)
|████████████████████████████████| 14.9 MB 26.9 MB/s
Collecting python-dateutil=2.7.3
Downloading python_dateutil-2.8.1-py2.py3-none-any.whl (227 kB)
|████████████████████████████████| 227 kB 5.0 MB/s
Collecting pytz=2017.3
Downloading pytz-2020.5-py2.py3-none-any.whl (510 kB)
|████████████████████████████████| 510 kB 10.2 MB/s
Collecting six=1.5
Downloading six-1.15.0-py2.py3-none-any.whl (10 kB)
Installing collected packages: six, pytz, python-dateutil, numpy, pandas
Successfully installed numpy-1.19.5 pandas-1.2.0 python-dateutil-2.8.1 pytz-2020.5 six-1.15.0
(name_of_my_env) demo@ubuntu:~/SelfStudy/python/python2/python2/SHAP$ ./test.py
Traceback (most recent call last):
File "./test.py", line 2, in module
import pandas as pd
ImportError: No module named pandas