PyUSB ValueError: No backend available

Question

I am runing Python 2.7.8 at Win 7 operation system. I am trying to communicate a USB device (Numato 32 channel GPIO device) by PyUSB.

I downloaded walac-pyusb-7071a

Answer 1

I had this trouble, and i switched python libusb wrappers and its gone: https://github.com/vpelletier/python-libusb1