Windows10下使用pyusb读取U盘遭遇NotImplementedError问题求助

尝试用pyusb读取U盘设备，代码如下：

import usb.core
import usb.backend.libusb1

VENDOR_ID = 0x0951
PRODUCT_ID = 0x1643 

device = usb.core.find(idVendor=VENDOR_ID, idProduct=PRODUCT_ID)
print(device)

if device is None:
    raise ValueError('Device not found')
    sys.exit(1)

usb.util.claim_interface(device, 0)

成功获取设备句柄，但执行usb.util.claim_interface(device, 0)或device.get_active_configuration()时触发NotImplementedError，错误信息如下：

DEVICE ID 0951:1643 on Bus 001 Address 013 =================
 bLength                :   0x12 (18 bytes)
 bDescriptorType        :    0x1 Device
 bcdUSB                 :  0x200 USB 2.0
 bDeviceClass           :    0x0 Specified at interface     
 bDeviceSubClass        :    0x0
 bDeviceProtocol        :    0x0
 bMaxPacketSize0        :   0x40 (64 bytes)
 idVendor               : 0x0951
 idProduct              : 0x1643
 bcdDevice              :  0x100 Device 1.0
 iManufacturer          :    0x1 Error Accessing String
 iProduct               :    0x2 Error Accessing String
 iSerialNumber          :    0x3 Error Accessing String
 bNumConfigurations     :    0x1
  CONFIGURATION 1: 100 mA ==================================
   bLength              :    0x9 (9 bytes)
   bDescriptorType      :    0x2 Configuration
   wTotalLength         :   0x20 (32 bytes)
   bNumInterfaces       :    0x1
   bConfigurationValue  :    0x1
   iConfiguration       :    0x0
   bmAttributes         :   0x80 Bus Powered
   bMaxPower            :   0x32 (100 mA)
    INTERFACE 0: Mass Storage ==============================
     bLength            :    0x9 (9 bytes)
     bDescriptorType    :    0x4 Interface
     bInterfaceNumber   :    0x0
     bAlternateSetting  :    0x0
     bNumEndpoints      :    0x2
     bInterfaceClass    :    0x8 Mass Storage
     bInterfaceSubClass :    0x6
     bInterfaceProtocol :   0x50
     iInterface         :    0x0
      ENDPOINT 0x81: Bulk IN ===============================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :   0x81 IN
       bmAttributes     :    0x2 Bulk
       wMaxPacketSize   :  0x200 (512 bytes)
       bInterval        :   0xff
      ENDPOINT 0x2: Bulk OUT ===============================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :    0x2 OUT
       bmAttributes     :    0x2 Bulk
       wMaxPacketSize   :  0x200 (512 bytes)
       bInterval        :   0xff
Traceback (most recent call last):
  File "C:\Users\Usuario\Documents\keylogger\ADU_USB.py", line 17, in <module>
    usb.util.claim_interface(device, 0)
  File "C:\Users\Usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\usb\util.py", line 207, in claim_interface
    device._ctx.managed_claim_interface(device, interface)
  File "C:\Users\Usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\usb\core.py", line 113, in wrapper
    return f(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\usb\core.py", line 170, in managed_claim_interface
    self.managed_open()
  File "C:\Users\Usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\usb\core.py", line 113, in wrapper
    return f(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\usb\core.py", line 131, in managed_open
    self.handle = self.backend.open_device(self.dev)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\usb\backend\libusb1.py", line 804, in open_device
    return _DeviceHandle(dev)
           ^^^^^^^^^^^^^^^^^^
  File "C:\Users\Usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\usb\backend\libusb1.py", line 652, in __init__
    _check(_lib.libusb_open(self.devid, byref(self.handle)))
  File "C:\Users\Usuario\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.11_qbz5n2kfra8p0\LocalCache\local-packages\Python311\site-packages\usb\backend\libusb1.py", line 600, in _check
    raise NotImplementedError(_strerror(ret))
NotImplementedError: Operation not supported or unimplemented on this platform

已确认libusb路径正确，不想使用Zadig替换驱动，寻求解决方法并询问是否可用pyserial替代。

1. 以管理员权限运行脚本 #

Windows下普通权限无法访问USB设备底层接口，管理员权限可提升设备访问权限，大概率解决权限不足导致的"操作不支持"问题。

2. 显式指定libusb后端路径 #

即使路径正确，显式指定后端文件可避免自动查找时的潜在问题，修改代码如下：

import usb.core
import usb.backend.libusb1

# 替换为你的libusb-1.0.dll实际路径
backend = usb.backend.libusb1.get_backend(find_library=lambda x: "C:/path/to/libusb-1.0.dll")

VENDOR_ID = 0x0951
PRODUCT_ID = 0x1643 

device = usb.core.find(idVendor=VENDOR_ID, idProduct=PRODUCT_ID, backend=backend)
print(device)

if device is None:
    raise ValueError('Device not found')

# 先尝试分离内核驱动并设置设备配置
try:
    if device.is_kernel_driver_active(0):
        device.detach_kernel_driver(0)
    device.set_configuration()
except usb.core.USBError as e:
    print(f"配置设备出错: {e}")

usb.util.claim_interface(device, 0)

3. 关闭占用设备的进程 #

U盘作为存储设备，资源管理器、文件管理器等进程可能正在占用设备，关闭这些工具后再运行脚本。

不能用pyserial解决该问题。pyserial是针对串口设备（含USB转串口设备）的通信库，而U盘属于Mass Storage类设备，遵循SCSI协议，与串口协议完全不兼容，pyserial无法和这类设备建立通信。

内容的提问来源于stack exchange，提问作者tristan ledet ledet