Default location of Python for new projects

Whenever I start a new project, the location of the Python executable is set it "./bin/python’ (I’m using the latest fully patch MacOS). (It is always a pain to try to find where this is set for each project as well - but that is probably my issue)
This is always wrong but where is that path coming from?
Is there a file somewhere that I can edit to set the correct path?
Susan