Python版本3.8
在Win10的Windows PowerShell中，执行命令
python -m pip install pywifi
安装pywifi提示成功，但 import pywifi 不成功
>>> import pywifi
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Program Files\Python38\lib\site-packages\pywifi\__init__.py", line 15, in <module>
from .wifi import PyWiFi
File "C:\Program Files\Python38\lib\site-packages\pywifi\wifi.py", line 15, in <module>
from .iface import Interface
File "C:\Program Files\Python38\lib\site-packages\pywifi\iface.py", line 11, in <module>
from . import _wifiutil_win as wifiutil
File "C:\Program Files\Python38\lib\site-packages\pywifi\_wifiutil_win.py", line 12, in <module>
from comtypes import GUID
ModuleNotFoundError: No module named 'comtypes'
提示信息意思是没有名为comtypes的模块，安装模块comtypes
python -m pip install comtypes
安装成功后，使用python命令启动python，再次运行 import pywifi，不再出错。
进入Windows PowerShell的方法，右键单击屏幕左下角Windows图标，
参考资料：
[1] 学习python时，导入某个模块时，报No module named 'comtypes'错.
https://blog.csdn.net/IT_charge/article/details/106193597
[2] Windows10如何以管理员的身份运行cmd,详细教程.
https://jingyan.baidu.com/article/0964eca2a3ee7f8284f5366e.html