my_value++    #<<Nope, you can't do this in Python!
my_value--    #<<Nope, you can't do this in Python!
#Do this instead:
my_value += 1
my_value -= 1

Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.