setupdi.py 文件源码

def get_property_keys(self):
        """
        Get all device property keys

        :return: Iterable of device property keys
        """
        if self._handle is None:
            with self.open():
                return self.get_property_keys()

        handle, dev_info, _ = self._handle
        required_size = ctypes.c_ulong()
        if not _setupapi.SetupDiGetDevicePropertyKeys(handle, ctypes.byref(dev_info), None, 0,
                                                      ctypes.byref(required_size), 0):
            err_no = ctypes.GetLastError()
            if err_no == 122:  # ERROR_INSUFFICIENT_BUFFER
                # noinspection SpellCheckingInspection
                devpkeys = (DevicePropertyKey * required_size.value)()
                if _setupapi.SetupDiGetDevicePropertyKeys(handle, ctypes.byref(dev_info), ctypes.byref(devpkeys),
                                                          required_size.value, None, 0):
                    return list(devpkeys)
                err_no = ctypes.GetLastError()

            raise WindowsError(err_no, ctypes.FormatError(err_no))
        return []