install taichi python package

[buran]

I cannot open the second link, do you mind explain in detail?

From the image I see you use following command trying to install the package

Output:
pip install taichi -i "https://pypi.doubanio.com/simple/"

if you run pip install --help

-i, --index-url <url> Base URL of the Python Package Index (default https://pypi.org/simple). This should point to a repository compliant with PEP 503 (the simple repository API) or a local directory laid out in the same format.

i.e. you pass pypi.doubanion.com as own repository (corporate one?)
I don't know if it exists - that's what you are doing....
And as I said - you create virtual environment, but it's not activated when you try to install the package. Follow @snippsat example


By the way - don't post images - copy/paste in respective tags all code, output, errors, cmd commands, etc.