Using uv as your shebang line(akrabat.com)

  #!/usr/bin/guile \
  -e main -s
  !#

  /usr/bin/guile -e main -s filename

      #!/usr/bin/env -s go run github.com/rliebz/tusk@latest -f

      interpreter: go run mvdan.cc/sh/v3/cmd/gosh@latest -s

    #!/usr/bin/env nix-shell
    #!nix-shell --pure -i runghc ./default.nix
    ... Any Haskell code follows

   /usr/bin/env -S myvar=${somevar} ${someprefix}/bin/myprogram

   /usr/bin/sh
   """exec" python --whatever "$@"
   Well this is still a Python docstring
   """
   print("hello")

   #! /usr/bin/sh
   # Tcl can use \ to continue comments, but not sh \
   exec tclsh "$@" # still a comment in Tcl
   puts "hello"

    $ cat cute-use-of-slash-slash.c
    //usr/bin/env sh -c 'p=$(expr '"_$0"' : "_\(.*\)\.[^.]*"); make $p > /dev/null && $p'; exit

    #include <stdio.h>

    int main()
    {
        puts("hello world");
    }
    $ chmod  +x cute-use-of-slash-slash.c
    $ ./cute-use-of-slash-slash.c
    hello world
    $ $(pwd)/cute-use-of-slash-slash.c
    hello world
    $ ../cc/cute-use-of-slash-slash.c
    hello world
    $ sed -i -e s/hello/bye/ cute-use-of-slash-slash.c
    $ ./cute-use-of-slash-slash.c
    bye world
    $

  % ./hworld.tcl  
  Hello, world.
  % cat hworld.tcl 
  #!/bin/sh
  # the next line restarts using tcl \
  exec tclsh "$0" "$@"
  puts "Hello, world."
  % 

  > For example, here’s a script I use to print out 80 zeroes (or a specific number of zeroes) 

  # Print 80 0's and flush 
  printf %.1s 0{1..80} $'\n'
  # Alternatively
  for i in {1..80}; do echo -n 0; done; echo

  ffmpeg -i in.mp4 -c:v copy -filter:a volumedetect -pass 1 -f null /dev/null &&\
  ffmpeg -i in.mp4 -c:v copy -filter:a "loudnorm" -pass 2 out.mp4

    try:
       import package
    except ImportError:
       import pip
       print("Installing package...")
       pip.main(['install', 'package']
       import package