Create a new script by executing "which".

new_script.sh

#!/bin/bash
# Append to ~/.bashrc
# Usage:
# Default editor from /etc/alternatives/editor: $ nf python ~/scripy.py 
# Custom editor: $ nf python ~/script.py vi
nf() {
    STR=$( echo "#!"`which "$1"` )
    if [ ! -f "$2" ]; then
        echo $STR > "$2"
        echo "" >> "$2"
        if [ -z ${3+x} ]; then EDT="/etc/alternatives/editor +2"; else EDT="$3 +2"; fi
            $EDT "$2"
            chmod +x "$2"
    else
        echo "File already exists!"
    fi

}