i changed the spi_speed_hz to 10,and i get the same message
Traceback (most recent call last):
File “/home/pi/test me.py”, line 18, in
spi_speed_hz=10
File “/usr/local/lib/python3.7/dist-packages/ST7735-0.0.4-py3.7.egg/ST7735/init.py”, line 186, in init
GPIO.setup(backlight, GPIO.OUT)
ValueError: The channel sent is invalid on a Raspberry Pi