run-time error

[chaodongyang]

Traceback (most recent call last): File "D:/pyusb-keyboard-alike-master/pyqt_example.py", line 65, in myapp = StartQT4() File "D:/pyusb-keyboard-alike-master/pyqt_example.py", line 30, in init self.rfidreader.initialize() File "D:\pyusb-keyboard-alike-master\keyboard_alike\reader.py", line 37, in initialize self._device = usb.core.find(idVendor=self.vendor_id, idProduct=self.product_id) File "C:\Python27\lib\site-packages\usb\core.py", line 1263, in find raise NoBackendError('No backend available') usb.core.NoBackendError: No backend available

[riklaunim]

That's a pyusb exception. Likely missing some system header libraries during compilation.