Re: [pyusb-users] ValueError: No backend available

[Emmanuel B. <ebl...@gm...>]

> It seems like libusb isn't installed correctly, but I used 'sudo apt-get
> install libusb' and after installing pyusb openusb.py, libusb10.py and
> libusb01.py are in /sw/lib/python2.5/site-packages/usb/backend. Am I
> missing something?

Try defining the path for the dynamic loader:

export DYLD_LIBRARY_PATH=/sw/...

/sw/... being the directory where you've installed the libusb*.dylib file.