[Pyusb-users] Getting Manufacturer and Serial string

[Brendan S. (eTRIX) <Bre...@eT...>]

I can't seem to read the Manufacturer and Serial Number string from USB
devices.

I have tried :
    dev.open().getString( dev.iManufacturer, 30)

but i just get an error as follows.

usb.USBError: usb_control_msg(DeviceRequestTO): unknown error

What is my mistake ??

Is there some other sample pyusb code to read the Manufacturer and
Serial strings ??

Thanks, Brendan.