usb device identification

Question

hello all i am using python on ubuntu 9.04 say i have two usb devices connected to a single PC. how can i identify the devices in python code.....for example like

if usb port id == A write data to device 1 if usb port id == B write data to device 2

any ideas....

Answer 1

This is completely operating system dependent and I know of no Python library which tries to handle such hardware abstractly.

Under Linux, you could use the lsusb(1) command to hopefully get the information you need, but that's hardly Pythonic.

Answer 2

Have you tried pyUsb? Here a snippet of what you can do:

import usb
busses = usb.busses()
for bus in busses:
    devices = bus.devices
    for dev in devices:
        print "Device:", dev.filename
        print "  idVendor: %d (0x%04x)" % (dev.idVendor, dev.idVendor)
        print "  idProduct: %d (0x%04x)" % (dev.idProduct, dev.idProduct)

Here a good tutorial of pyUsb.

For more documentation, use Python interactive mode with dir() and help().