python snippet to enumerate serial ports on Windows

gistfile1.py

import itertools
import _winreg as winreg

def enumerate_serial_ports():
	path = 'HARDWARE\\DEVICEMAP\\SERIALCOMM'
	key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, path)
	ports = []
	for i in itertools.count():
		try:
			val = winreg.EnumValue(key, i)
			ports.append(str(val[1]))
		except EnvironmentError:
			break
	return sorted(ports)