IOKit IOUSBDevice enumeration

iousb.py

import objc
from Foundation import NSBundle

IOKit_bundle = NSBundle.bundleWithIdentifier_('com.apple.framework.IOKit')
functions = [
             ("IORegistryEntryCreateCFProperties", b"IIo^@II"),
             ("IOServiceMatching", b"@*"),
             ("IOServiceGetMatchingServices", b"II@o^I"),
             ("IOIteratorNext", b"II"),
            ]

objc.loadBundleFunctions(IOKit_bundle, globals(), functions)

kIOMasterPortDefault = 0
kCFAllocatorDefault = 0
kNilOptions = 0

match_dictionary = IOServiceMatching("IOUSBDevice")
err, usb_iter = IOServiceGetMatchingServices(kIOMasterPortDefault, match_dictionary, None)

if err == 0:
    next_item = IOIteratorNext(usb_iter)
    while (next_item != 0):
        err, details = IORegistryEntryCreateCFProperties(next_item, None, kCFAllocatorDefault, kNilOptions)
        print details
        next_item = IOIteratorNext(usb_iter)