Installation location for python code, tools, etc.

[Forrest Aldrich]

I'm not very experienced with Python, yet, but with regard to MacPorts, 
I'm trying to understand why when I do a pip3 install, or a direct 
install from a project tree ie: "python setup.py install" the tool(s) 
end up in this directory instead of /opt/local/bin|sbin etc:

/opt/local/Library/Frameworks/Python.framework/Versions/3.9/bin/
I'm suspecting an environment variable.


Thanks.