quick MAC address formatter. it's really annoying to manually insert/remove colons

makemac.py

#!/usr/bin/env python3

import sys
import argparse
import subprocess
import re

def cleanmac(mac):
    return re.sub('[^0-9a-f]', '', mac.lower())

def checkmac(mac):
    try:
        assert len(mac) == 12
    except:
        print("[!] invalid MAC address length")
        sys.exit(1)
    try:
        for c in mac:
            assert c in '0123456789abcdef'
    except:
        print("[!] invalid characters in MAC address")
        sys.exit(1)
    return True

def makecisco(mac):
    return mac[:4] + '.' + mac[4:8] + '.' + mac[8:]

def makecolon(mac):
    return mac[:2] + ':' + mac[2:4] + ':' + mac[4:6] + ':' + mac[6:8] + ':' + mac[8:10] + ':' + mac[10:12]

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("mac", help="MAC address", action="store", type=str)
    parser.add_argument("-a", "--ad", help="active directory format, no punctuation", action="store_true")
    parser.add_argument("-s", "--standard", help="messy colon format", action="store_true")
    parser.add_argument("-c", "--cisco", help="cisco-style groups of four chars", action="store_true")
    args = parser.parse_args()
    mac = cleanmac(args.mac)
    checkmac(mac)
    if args.ad:
        print(mac + subprocess.getoutput('echo "$(tput bold) (copied) $(tput sgr0)"'))
        subprocess.getoutput('echo ' + mac + ' | pbcopy')
    elif args.standard:
        print(makecolon(mac) + subprocess.getoutput('echo "$(tput bold) (copied) $(tput sgr0)"'))
        subprocess.getoutput('echo ' + makecolon(mac) + ' | pbcopy')
    elif args.cisco:
        print(makecisco(mac) + subprocess.getoutput('echo "$(tput bold) (copied) $(tput sgr0)"'))
        subprocess.getoutput('echo ' + makecisco(mac) + ' | pbcopy')
    else:
        print(mac)
        print(makecisco(mac) + subprocess.getoutput('echo "$(tput bold) (copied) $(tput sgr0)"'))
        subprocess.getoutput('echo ' + makecisco(mac) + ' | pbcopy')
        print(makecolon(mac))

if __name__ == '__main__':
    main()