Using pychar, import numpy   no problem

But jupyter notebook   no way.

I tried to add environment variables on the Internet, but I can’t.

Numpy, which is not a virtual environment, has no problem,

There are problems with virtual environments,

The virtual environment uses CONDA   Install.

Considering the isolation of virtual environment, I use pip   install   ，
It can be found.

pip uninstall numpy

pip install numpy -i https://pypi.tuna.tsinghua.edu.cn/simple

The most direct and essential method: switch to the virtual environment and start jupyter   At this time, switch the kernel to the python core of the virtual environment