Use System Profiler (Lion or earlier) or System Information (Mountain lion) and 
go to the USB view.

It will show the information there.

Alternatively, the information is in iokit.


In terminal, run
system_profiler SPUSBDataType

Happy Hacking!

On May 3, 2013, at 7:57 PM, I Rabkina <irina.rabk...@gmail.com> wrote:

> Hi Karl,
> 
> Those are the numbers they gave me. Do you think converting the vendor ID to 
> hex (or product ID to decimal) could fix the problem?
> 
> Thanks,
> Irina
> 
> 
> On Fri, May 3, 2013 at 3:40 PM, Karl P <ka...@tweak.net.au> wrote:
> 
> 
> On 05/03/2013 06:48 PM, Wander Lairson Costa wrote:
> > 2013/5/3 I Rabkina <irina.rabk...@gmail.com>:
> >> Hello,
> >>
> >> I am just getting started with pyusb. I need it to send an high/low signal
> >> to a DAQ box using USB. Unfortunately, I am coming across a problem within
> >> the first few lines of code. Specifically, pyusb can't find the device. I
> >> assumed that the error was from having incorrect IDs, but I've checked with
> >> the manufacturer and they are correct. Am I doing something incorrect with
> >> the code or does pyusb not support this kind of device? The code I'm using
> >> is below.
> >>
> >> import usb.core
> >> import usb.util
> >>
> >> #find the device
> >> dev = usb.core.find (idVendor=1307, idProduct=0x82)
> >>
> >> if dev is None:
> >>     raise ValueError ('DAQ not found')
> >>
> >> dev.set_configuration()
> >>
> 
> Really?  You reallllly mean to use hex for one and decimal for the other?  You
> may have checked with the manufacturer, but that seems like a needlessly
> confusing way to do things if deliberate....
> 
> Cheers,
> Karl P
> 
> 
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