>>> dev=usb.core.find()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\usb\core.py", line 819, in find
raise ValueError('No backend available')
ValueError: No backend available
答案 0 :(得分:11)
您需要安装libusb-1.0,libusb-0.1或openusb作为pyusb的后端。这是一台Windows机器吗?
如果是这样,您可以在此处下载简单的安装程序:http://www.craftedge.com/products/libusb.html