Simple way to query connected USB devices info in Python?

Question

How can we query connected USB devices info in Python? I want to get UID Device Name (ex: SonyEricsson W660), path to device (ex: /dev/ttyACM0)

And also what would be the best Parameter out of above info to be used as identifying the device whenever it's connected again? (UID?)

I am working on Ubuntu 11.04.

ATM I have this code (using pyUSB)

busses = usb.busses() for bus in busses:   devices = bus.devices   for dev in devices:     print repr(dev)     print "Device:", dev.filename     print "  idVendor: %d (0x%04x)" % (dev.idVendor, dev.idVendor)     print "  idProduct: %d (0x%04x)" % (dev.idProduct, dev.idProduct)     print "Manufacturer:", dev.iManufacturer     print "Serial:", dev.iSerialNumber     print "Product:", dev.iProduct 

The problem is I don't get desired output, will paste one example:

<usb.legacy.Device object at 0x1653990> Device:    idVendor: 4046 (0x0fce)   idProduct: 53411 (0xd0a3) Manufacturer: 1 Serial: 3 Product: 2 

First I don't get filename, it's most important to me. I am assuming it is the /dev/ttyACM0 etc part. Second, I guess there was some UID of every USB device, or I should use both Vendor or Product id?

EDIT: Apparently I have some setup issues, I think I am using wrong USB Library. (using libusb0.1) ATM. That's why I get Device (dev.filename) string empty. If someone can please just tell that on what operating system he is using what USB Library and what version of PyUSB I think it will solve my problems.

Answer 1

I can think of a quick code like this.

Since all USB ports can be accessed via /dev/bus/usb/< bus >/< device >

For the ID generated, even if you unplug the device and reattach it [ could be some other port ]. It will be the same.

import re import subprocess device_re = re.compile("Bus\s+(?P<bus>\d+)\s+Device\s+(?P<device>\d+).+ID\s(?P<id>\w+:\w+)\s(?P<tag>.+)$", re.I) df = subprocess.check_output("lsusb") devices = [] for i in df.split('\n'):     if i:         info = device_re.match(i)         if info:             dinfo = info.groupdict()             dinfo['device'] = '/dev/bus/usb/%s/%s' % (dinfo.pop('bus'), dinfo.pop('device'))             devices.append(dinfo) print devices 

Sample output here will be:

[ {'device': '/dev/bus/usb/001/009', 'tag': 'Apple, Inc. Optical USB Mouse [Mitsumi]', 'id': '05ac:0304'}, {'device': '/dev/bus/usb/001/001', 'tag': 'Linux Foundation 2.0 root hub', 'id': '1d6b:0002'}, {'device': '/dev/bus/usb/001/002', 'tag': 'Intel Corp. Integrated Rate Matching Hub', 'id': '8087:0020'}, {'device': '/dev/bus/usb/001/004', 'tag': 'Microdia ', 'id': '0c45:641d'} ] 

Code Updated for Python 3

import re import subprocess device_re = re.compile(b"Bus\s+(?P<bus>\d+)\s+Device\s+(?P<device>\d+).+ID\s(?P<id>\w+:\w+)\s(?P<tag>.+)$", re.I) df = subprocess.check_output("lsusb") devices = [] for i in df.split(b'\n'):     if i:         info = device_re.match(i)         if info:             dinfo = info.groupdict()             dinfo['device'] = '/dev/bus/usb/%s/%s' % (dinfo.pop('bus'), dinfo.pop('device'))             devices.append(dinfo)              print(devices)