Identify USB device and discover its name and port
Download latest PyUSB from :
http://sourceforge.net/projects/pyusb/files/PyUSB%201.0/1.0.0-beta-2/pyusb-1.0.0b2.tar.gz/download
Place file “pyusb-1.0.0b2.tar.gz” on your desktop
gunzip <pyusb-1.0.0b2.tar.gz |tar xvfp...
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