import re
text = "one,two or three , four or five or , or six , oR , seven, ,,or, ,, eight or qwertyor orqwerty,"
print( re.split(r'(?:\s*(?:,|\bor\b))+\s*', text.rstrip().rstrip(',')) )
aW1wb3J0IHJlCnRleHQgPSAib25lLHR3byBvciB0aHJlZSAgICwgICBmb3VyICAgb3IgICBmaXZlICBvciAsIG9yIHNpeCAsIG9SICAgLCAgc2V2ZW4sICwsb3IsICAgLCwgZWlnaHQgb3IgcXdlcnR5b3Igb3Jxd2VydHksIgpwcmludCggcmUuc3BsaXQocicoPzpccyooPzosfFxib3JcYikpK1xzKicsIHRleHQucnN0cmlwKCkucnN0cmlwKCcsJykpICk=
['one', 'two', 'three', 'four', 'five', 'six', 'oR', 'seven', 'eight', 'qwertyor orqwerty']