The problem from issue #37509 comes from local virtual environments
created with certain approaches (including the 'simple' way of `python
-m venv`) not having a `.project` file with the path to the project's
root directory. When the toolchains are sorted, a virtual environment in
the project is not treated as being for that project and therefore is
not prioritized.
With this change, if a toolchain does not have a `project` associated
with it, we check to see if it is a virtual environment, and if it is we
use its parent directory as the `project`. This will make it the top
priority (i.e. the default) if there are no other virtual environments
for a project, which is what should be expected.
Closes#37509
Release Notes:
- Improved python toolchain prioritization of local virtual
environments.
ee912366a3