For example, it's located at /usr/local/bin/python on FreeBSD.

On a Solaris machine, it could be at an arbitrary path, like
/opt/ts/python/<version>/bin/python

The best practice is so to find python in the enviroment prompt,
instead to hardcore a path. We then call /usr/bin/env (which is
a standard executable in every POSIX OS, so always there).