先ほどの警告と共に参考となるURLが示されていたので、そのURLを読んでみると、Pythonのパッケージをインストールするには、直接pipコマンドを ...

To install the NumPy library using PIP, use the command: pip install numpy. This command will download and install the latest version of NumPy from the Python Package Index (PyPI) to your system.

If you’ve upgraded an existing Python interpreter with a minor point upgrade—e.g., from Python 3.11.1 to Python 3.11.3—you can upgrade any corresponding virtual environments easily enough.

Devs unknowingly use “malicious” modules snuck into official Python repository Code packages available in PyPI contained modified installation scripts.