python - Pyusb on windows - no backend available

Question

I'm trying to have my python application interface with an NFC device via USB. The best option seems to be pyusb, but I can't get it to connect to the libusb backend. I keep getting

ValueError: No backend available

I've looked at the stack trace, and found that usb/backend/libusb10.py (which is part of pyusb) is trying to load libusb-1.0.dll to use as the backend, but it can't find it. It's not that its not in my path, its not on my computer at all!

I have installed libusb-win32 (http://libusb.org/wiki/libusb-win32), but the resulting directory only seems to include libusb0.dll. Where is libusb-1.0.dll???!

I would love to know either where to get that dll, or even a different suggestion to get pyusb to work on Windows 7.

Answer 1

Download and install libusb-win32-devel-filter-1.2.6.0.exe. It should work.