Get the hardware serial number for Raspberry Pi or Mac in Python 3.6

get_serial.py

import platform, re, subprocess, os.path, logging;

log = logging.getLogger('simple_example')
log.setLevel(logging.INFO)

# get local system serial identifier
# tested for Raspberry Pi and Mac OSX
def get_serial():
	log.info("getting serial number")
	ptn = None

	# specify method per OS
	if platform.system() == 'Linux':
		ptn = ['linux', ['cat', '/proc/cpuinfo'], r'Serial\t\t: (\w*)'] 
	elif platform.system() == 'Darwin' and platform.mac_ver()[0]:
		ptn = ['osx', ['system_profiler', 'SPHardwareDataType'], r'Serial Number \(system\): (\w*)'] 

	# if an OS was found
	if ptn:
		log.info('%s platform' % ptn[0])
		procinfo = subprocess.run(ptn[1], stdout=subprocess.PIPE).stdout.decode('utf-8')
		serial = re.search(ptn[2], procinfo).group(1)
	else:
		log.warning("error: system type not supported yet")
	if serial: log.info("serial: %s" % serial)
	return serial

	
print(get_serial())