My device ，Raspberry Pi 4 Model B Rev 1.2 ，and a 6-mic array
the codes that I entered are as follow，
pi@raspberrypi:~ $ sudo pip install pyusb
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Requirement already satisfied: pyusb in /usr/local/lib/python3.7/dist-packages (1.0.2)
pi@raspberrypi:~ $ sudo python pixel_ring.py
No USB device found
Please reply as soon as possible.
thank you for all your assistance.