在Python中過濾USB HID列

Question

東西我似乎無法找到答案。請記住，我不是專家，所以我可能會錯過簡單的，也許我打印我想要的設備。 我試圖存儲設備版本號（從這裏dvm），關閉USB設備。問題是USB設備有兩列用於報告，功能和輸出。

所以當我打印設備時，我收到兩組打印語句。

＃

DEF設備（target_usage，target_vendor_id）：

hidDevice = False 
all_devices = hid.HidDeviceFilter(vendor_id = target_vendor_id).get_devices() 
print "\n", all_devices 
if len(all_devices) == 0: 
    # Exit if no devices found, report error. 
    hidDevice = False 
    time.sleep(0.2) 
    print "No devices can be detected, please check device is connected." 
    sys.exit(1) 
    return 
elif len(all_devices) > 2: 
    # announce there are more than 1 device connected to prevent conflicting upgrades 
    hidDevice = True 
    time.sleep(0.2) 
    print "Too many devices connected, ensure the only device connected is the device needed to test." 
    sys.exit(1) 

else: 
    # loop through all devices 
    for device in all_devices: 
     try: 
      device.open() 

      # print device details 
      device_name = unicode("=== INFO: Found %s %s (vID=[%04x], pID=[%04x], version number [%04x]) ===" % \ 
      (device.vendor_name, device.product_name, device.vendor_id, device.product_id, device.version_number)) 
      dvm = unicode("%04x" % \ 
      (device.version_number)) 
      print dvm; 
      print device_name; 

     finally: 
      device.close() 

    hidDevice = True 

return hidDevice 

＃

當這個函數被調用時，它將打印所有的設備，但我結束了以下結果（修改的PID/VIDS等爲隱私問題。）

[HID設備（vID = 0x0000，pID = 0x0000，v = 0x0000）;使;型號，路徑：\？\ hid＃vid_0000 & pid_0000 & col01＃7 0000＃{00000000-0000-0000-0000-000000000000}，HID設備（vID = 0x0000，pID = 0x0000，v = 0x0000） ;使;模型，路徑：\ \躲在＃vid_0000 & pid_0000 & col02＃7 0000＃{} 00000000-0000-0000-0000-000000000000

的重要組成部分，是COL01和col02。

如何過濾第二枚枚舉的HID設備？

Answer 1

包括以下代碼。

for report in device.find_output_reports(): 
        if target_usage in report: 
         # add to target list 
         Targets.append(device) 

      finally: 
       device.close() 

     for item in Targets:   

      try: 
       item.open(output_only = True) 
       dvm = unicode("%04x" % \ 
       (device.version_number)) 
       print dvm 
      finally: 
       item.close() 

問題已解決。