gistfile1.py

import re
import subprocess

#device_re = "Bus \d{,3} Device \d{,3}: ID ([a-f0-9]+:[a-f0-9]+)"
device_re = "ID ([a-f0-9]+:[a-f0-9]+)"

df = subprocess.check_output("lsusb", shell=True)
for i in df.split('\n'):
    if i:
        print (re.findall(device_re, i, re.I))