Hi,
I'm trying to start interfacing with USB devices with Python which led me to
PyUSB. I have installed the following software already:
Mac OSX 10.6.5Xcode 3.2.3Python 2.6.6 and
3.2pkg-config-0.18.1libusb-1.0.8pyusb-1.0.0-a1
In Python (2.6) I can have it import the usb.core and usb.util but when I go to
run a sample test program (below)
import usb.coreimport usb.utilimport sys
# find our devicedev = usb.core.find(idVendor=0x8086, idProduct=0x00b2) # was
it found?if dev is None: raise ValueError('Device not found') # set the
active configuration. With no arguments, the first# configuration will be the
active onedev.set_configuration() print "all done"
I get this error and not the proper one
Traceback (most recent call last): File "/Users/admin/Desktop/python test/find
wacom", line 7, in <module> dev = usb.core.find(idVendor=0x8086,
idProduct=0x00b2) File
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/core.py",
line 829, in find raise ValueError('No backend available')ValueError: No
backend available
I've looked around and found a few forums addressing the issue but didn't
really get a clear answer. I found one that talked about making some changes to
a file but wasn't real clear on what exactly the changes were. Any help would
be greatly appreciated.
Thanks,mike scalisi
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