Question

我试图在Windows 7 64位上使用python 2.6.6列出我的USB设备。这是我正在使用的脚本：

import usb

def list_devices(idVendor=None, idProduct=None):
    """Look through the usb tree for devices with a given Vendor ID and, if
       specified, a Product ID. Return list of usb.Device classes.
    """
    return_devices=[]
    busses=usb.busses()

    for bus in busses:
        for device in bus.devices:
            if device.idVendor == idVendor or idVendor==None:
                if device.idProduct == idProduct or idProduct == None:
                    print("Vendor id: "+str(hex(device.idVendor))+" Product id: "+str(hex(device.idProduct))+"\n")
                    return_devices.append(device)

    return return_devices

if __name__=="__main__":
    list_devices()

这是我收到的错误消息：

Traceback (most recent call last):
  File "C:/Python26/Scripts/find_usb_devices", line 25, in <module>
    list_devices()
  File "C:/Python26/Scripts/find_usb_devices", line 13, in list_devices
    busses=usb.busses()
  File "C:\Python26\lib\site-packages\usb\legacy.py", line 333, in busses
    return (Bus(),)
  File "C:\Python26\lib\site-packages\usb\legacy.py", line 329, in __init__
    self.devices = [Device(d) for d in core.find(find_all=True)]
  File "C:\Python26\lib\site-packages\usb\legacy.py", line 314, in __init__
    self.configurations = [Configuration(c) for c in dev]
  File "C:\Python26\lib\site-packages\usb\core.py", line 723, in __iter__
    yield Configuration(self, i)
  File "C:\Python26\lib\site-packages\usb\core.py", line 419, in __init__
    configuration
  File "C:\Python26\lib\site-packages\usb\backend\libusb10.py", line 471, in get_configuration_descriptor
    config, byref(cfg)))
  File "C:\Python26\lib\site-packages\usb\backend\libusb10.py", line 403, in _check
    raise USBError(_str_error[ret], ret, _libusb_errno[ret])
USBError: [Errno 2] Entity not found

如果有人可以帮助解决此问题，那将会很方便。奇怪的是，当我在运行Windows 10的笔记本电脑上在Python 2.7上尝试相同的代码时，它运行顺畅。提前谢谢。

USBError：[Errno 2]在Python 2.6中找不到实体

0 个答案: