By default the python macOS installer will edit .bash_profile and .zsh_profile to add Python to the path.

For many users this is a problem that requires the added lines to be
removed after each install.

I suggest that there is a mechanism that the user can use to tell the
installer to leave the files as is.

Once option could be to add a marker in the profile files that when present turns off the editing.

For example a comment like:

# python: no-path-edit

Another possiblity is for the user to create a marker file that is checked for:

touch ~/Library/Preferences/org.python.no-path.edit

Any reasonable mechinism would be a great help.