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I have multiple installations of Python on my machine. I already know how to choose one to use to run for my code - and therefore, I could also solve the problem for third-party application code. ...
#1: Initial revision
Installing packages for, and using them with, a specific Python installation
I have multiple installations of Python on my machine. I [already know](https://software.codidact.com/posts/291616) how to choose one to use to run for my code - and therefore, I could also solve the problem for third-party application code. However, almost all of the third-party code I work with is *libraries*, not applications. When I use Pip to install something from PyPI, I find that only one Python installation can use the code. Worse, the installation chosen by `pip` **isn't necessarily the Python chosen** by `python`. Why don't (can't?) my Python installations share libraries? How do I choose one as the "target" for a Pip installation?