4.2.2 Executable Python Scripts

On BSD'ish UNIX systems, Python scripts can be made directly executable, like shell scripts, by putting the line

    #! /usr/bin/env python

(assuming that the interpreter is on the user's ‘PATH’) at the beginning of the script and giving the file an executable mode. The ‘#!’ must be the first two characters of the file. Note that the hash, or pound, character, ‘#’, is used to start a comment in Python.