利用pyusb来查询当前所以usb设备

具体代码如下

#!/usr/bin/python
# -*- coding:utf-8 -*- 
 
import sys
import usb.core
# find USB devices
dev = usb.core.find(find_all=True)
# loop through devices, printing vendor and product ids in decimal and hex
for cfg in dev:
  sys.stdout.write('Decimal VendorID=' + str(cfg.idVendor) + ' & ProductID=' + str(cfg.idProduct) + '\n')
  sys.stdout.write('Hexadecimal VendorID=' + hex(cfg.idVendor) + ' & ProductID=' + hex(cfg.idProduct) + '\n\n')

测试结果如下

键盘有插入时usb的情况

Python 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 07:18:10) [MSC v.1900 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>>
================== RESTART: C:/Users/libra/Desktop/1111.py ==================
Decimal VendorID=32902 & ProductID=35878
Hexadecimal VendorID=0x8086 & ProductID=0x8c26
 
Decimal VendorID=32902 & ProductID=35885
Hexadecimal VendorID=0x8086 & ProductID=0x8c2d
 
Decimal VendorID=1133 & ProductID=49948
Hexadecimal VendorID=0x46d & ProductID=0xc31c
 
Decimal VendorID=1266 & ProductID=46001
Hexadecimal VendorID=0x4f2 & ProductID=0xb3b1
 
Decimal VendorID=7247 & ProductID=81
Hexadecimal VendorID=0x1c4f & ProductID=0x51
 
Decimal VendorID=32903 & ProductID=32768
Hexadecimal VendorID=0x8087 & ProductID=0x8000
 
Decimal VendorID=32903 & ProductID=32776
Hexadecimal VendorID=0x8087 & ProductID=0x8008
 
Decimal VendorID=32902 & ProductID=35889
Hexadecimal VendorID=0x8086 & ProductID=0x8c31

键盘问插入时usb的情况

================== RESTART: C:/Users/libra/Desktop/1111.py ==================
Decimal VendorID=32902 & ProductID=35878
Hexadecimal VendorID=0x8086 & ProductID=0x8c26
 
Decimal VendorID=32902 & ProductID=35885
Hexadecimal VendorID=0x8086 & ProductID=0x8c2d
 
Decimal VendorID=1266 & ProductID=46001
Hexadecimal VendorID=0x4f2 & ProductID=0xb3b1
 
Decimal VendorID=7247 & ProductID=81
Hexadecimal VendorID=0x1c4f & ProductID=0x51
 
Decimal VendorID=32903 & ProductID=32768
Hexadecimal VendorID=0x8087 & ProductID=0x8000
 
Decimal VendorID=32903 & ProductID=32776
Hexadecimal VendorID=0x8087 & ProductID=0x8008
 
Decimal VendorID=32902 & ProductID=35889
Hexadecimal VendorID=0x8086 & ProductID=0x8c31