No USB device found

[fengjunzhe]

when I started step 1；
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

thank you for all your assistance.

[cipy]

same issue on 4Mics Pi HAT