https://learn.adafruit.com/i31fl3731-16x9-charliplexed-pwm-led-driver/python-docs
Python Docs | IS31FL3731 16x9 Charlieplexed PWM LED Driver | Adafruit Learning System
The IS31FL3731 will let you get back to that classic LED matrix look, with a nice upgrade! This I2C LED driver chip has the ability to PWM each individual LED...
python docsled driver