https://learn.adafruit.com/16-channel-pwm-servo-driver/python-docs-servokit
Python Docs: ServoKit | Adafruit PCA9685 16-Channel Servo Driver | Adafruit Learning System
Learn how to connect and program the 16-channel 12-bit PWM/Servo Driver with Arduino, Python or CircuitPython
python docsservo driveradafruit