>>> %Run serverTest.py
Can't open /dev/mem: Permission denied
Traceback (most recent call last):
  File "/home/pi/adeept_darkpaw/server/serverTest.py", line 40, in <module>
    LED = LED.LED()
  File "/home/pi/adeept_darkpaw/server/LED.py", line 43, in __init__
    self.strip.begin()
  File "/usr/local/lib/python3.7/dist-packages/rpi_ws281x/rpi_ws281x.py", line 130, in begin
    raise RuntimeError('ws2811_init failed with code {0} ({1})'.format(resp, str_resp))
RuntimeError: ws2811_init failed with code -5 (mmap() failed)
>>>