psutil 是一个第三方包，须要独自装置。
起因，我没有应用 ubuntu20 自带的 python3.8 ，而是再装置了一个 python3.9 。
python3.8 和 3.9 共存就须要咱们本人解决抵触问题了。
Python 3.9.5 (default, May 19 2021, 11:32:47) [GCC 9.3.0] on linuxType "help", "copyright", "credits" or "license" for more information.>>> import psutilTraceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python3/dist-packages/psutil/__init__.py", line 95, in <module> from . import _pslinux as _psplatform File "/usr/lib/python3/dist-packages/psutil/_pslinux.py", line 26, in <module> from . import _psutil_linux as cextImportError: cannot import name '_psutil_linux' from partially initialized module 'psutil' (most likely due to a circular import) (/usr/lib/python3/dist-packages/psutil/__init__.py)>>> exit解决办法：
pip install psutil -U为什么要用 -U 参数呢
In [1]: import sysIn [2]: sys.pathOut[2]: ['/home/bot/.local/bin', '/usr/lib/python39.zip', '/usr/lib/python3.9', '/usr/lib/python3.9/lib-dynload', '', '/home/bot/.local/lib/python3.9/site-packages', '/usr/local/lib/python3.9/dist-packages', '/usr/lib/python3/dist-packages', '/home/bot/.local/lib/python3.9/site-packages/IPython/extensions', '/home/bot/.ipython']In [3]: exit因为 python 解释器在找包的时候会优先搜寻用户目录下的包，咱们装在本人的解释器环境下能够防止和零碎环境下的 psutil 抵触